Year 9 Electric Circuit Test
(118).jpg "Year 9 Electric Circuit Test - Quiz")
You must have read about electricity and electric circuits during your Science class. The quiz below tests your knowledge of the year 9 electric circuits. As part of the larger Science subject, electric circuits are taught. Electric energy is used in many different ways, both directly and otherwise. An electric circuit is a closed loop or path, forming a model of electrical components in which electrons can flow. The quiz below is all about electric circuits. Play it now to increase your understanding of it.
Questions and Answers
- 1.
What circuit symbol is this?
- A.
A Bulb
- B.
A Motor
- C.
A Fuse
- D.
A Cell
Correct Answer
A. A BulbExplanation
The circuit symbol shown in the question represents a bulb. This symbol is commonly used to represent a light bulb in electrical circuit diagrams. It consists of a circle with a small line or cross inside it, representing the filament of the bulb. When electricity flows through the filament, it heats up and produces light, making the bulb glow.Rate this question:
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- 2.
Voltage does not split in a parallel circuit.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In a parallel circuit, the voltage across each branch remains the same. This is because each branch is connected directly across the voltage source, allowing them to have the same potential difference. Therefore, the voltage does not split or divide in a parallel circuit.Rate this question:
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- 3.
How does current behave in a series circuit?
- A.
Stays the same
- B.
Splits at a branch
- C.
Is given to the cell
- D.
Varies throughout the circuit.
Correct Answer
A. Stays the sameExplanation
In a series circuit, the current stays the same throughout the circuit. This is because there is only one path for the current to flow, so it cannot split or be given to any particular component. The current flows through each component in the circuit, but the amount of current remains constant. Therefore, the correct answer is "Stays the same."Rate this question:
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- 4.
A single battery is called a ----?
Correct Answer
cell
Cell
CELLExplanation
The correct answer is "cell". A single battery is referred to as a cell, regardless of the capitalization. The term "cell" is commonly used to describe the basic unit of a battery that converts chemical energy into electrical energy.Rate this question:
- 5.
Current is the amount of energy provided by the circuit, increasing this made the electrons travel faster.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Increasing the current in a circuit does not make the electrons travel faster. Current is defined as the rate of flow of charge, and it is determined by the voltage and resistance in the circuit according to Ohm's Law. Increasing the current simply means that more charge is flowing per unit time, but it does not affect the speed of individual electrons. The speed of electrons in a circuit is typically very slow, on the order of millimeters per second, regardless of the current. Therefore, the statement is false.Rate this question:
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- 6.
This is the symbol for:
- A.
An Ammeter
- B.
A Voltmeter
- C.
A Buzzer
- D.
An Electric Shock
Correct Answer
A. An AmmeterExplanation
The symbol shown represents an ammeter. An ammeter is a device used to measure electric current in a circuit. The symbol typically consists of a circle with a letter "A" inside, indicating the unit of measurement, which is amperes. The ammeter is connected in series with the circuit, allowing the current to pass through it and provide a reading of the current flowing in the circuit.Rate this question:
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- 7.
Which of the following describes a series circuit?
- A.
Current flows along each branch
- B.
Bulbs are all in a loop
- C.
If one bulb breaks the other one still works
- D.
All of the above
Correct Answer
B. Bulbs are all in a loopExplanation
A series circuit is a type of electrical circuit where the components, in this case, the bulbs, are connected in a single loop or pathway. In a series circuit, the current flows along each branch or component, meaning that the same current passes through each bulb. If one bulb breaks or stops working, the circuit is interrupted, and all bulbs will stop working as well. Therefore, the statement "bulbs are all in a loop" accurately describes a series circuit.Rate this question:
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- 8.
Which of the following describes a parallel circuit?
- A.
All bulbs do not light up together
- B.
If one bulb breaks the circuit is broken
- C.
Current flows along each branch
- D.
All of the above
Correct Answer
C. Current flows along each branchExplanation
A parallel circuit is a type of electrical circuit where the components are connected in such a way that there are multiple paths for the current to flow. In this type of circuit, the current is divided and flows along each branch independently. Therefore, the statement "current flows along each branch" accurately describes a parallel circuit.Rate this question:
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- 9.
What units does the electrical current have?
- A.
Amps
- B.
Volts
- C.
Power
- D.
All of the above
Correct Answer
A. AmpsExplanation
The correct answer is Amps. Amps is the unit of measurement for electrical current. Volts measure the electrical potential difference, while power measures the rate at which energy is transferred or used. Therefore, the correct unit for electrical current is Amps.Rate this question:
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- 10.
What type of circuit do we find in our houses?
- A.
Parallel
- B.
Series
- C.
Both
- D.
None
Correct Answer
A. ParallelExplanation
In our houses, we find parallel circuits. A parallel circuit is a type of circuit where the components are connected in such a way that there are multiple paths for the current to flow. This means that if one component fails or is removed, the other components will continue to function. In our houses, various electrical appliances and devices are connected in parallel to ensure that they can operate independently without affecting each other.Rate this question:
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- 11.
When you skin is wet, electricity can pass through you
- A.
Easier
- B.
Harder
- C.
The same
- D.
It's not clear.
Correct Answer
A. EasierExplanation
When your skin is wet, it becomes a better conductor of electricity compared to when it is dry. This is because water is a good conductor of electricity and when it comes in contact with your skin, it allows the electrical current to flow more easily through your body. Therefore, when your skin is wet, electricity can pass through you more easily than when your skin is dry.Rate this question:
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- 12.
Electric current in a/an ____________________ circuit travels in MORE THAN ONE path.
- A.
Series
- B.
Wire
- C.
Parallel
- D.
Connected
Correct Answer
C. ParallelExplanation
In a parallel circuit, the electric current has multiple paths to travel through. Each component in the circuit is connected to the same two points, creating separate branches for the current to flow. This allows the current to divide and flow through each path simultaneously. As a result, the total current in the circuit is equal to the sum of the currents flowing through each branch.Rate this question:
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- 13.
In a/an ________________________ circuit, if one bulb burns out, the others will stay lit.
- A.
Parallel
- B.
Series
- C.
Both
- D.
None
Correct Answer
A. ParallelExplanation
In a parallel circuit, each bulb has its own separate pathway for current to flow. This means that if one bulb burns out, it will not interrupt the flow of current to the other bulbs. Therefore, the other bulbs will stay lit even if one bulb is not functioning.Rate this question:
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- 14.
In a _________________________ circuit, if one bulb burns out, the others will not work.
- A.
Parallel
- B.
Series
- C.
Both
- D.
Connected
Correct Answer
B. SeriesExplanation
In a series circuit, the components are connected one after another, forming a single pathway for the current to flow. If one bulb burns out, it creates an open circuit, interrupting the flow of current and causing all the other bulbs to stop working. This is because the current has only one path to follow, and if that path is broken, the circuit is incomplete and no current can flow. Therefore, in a series circuit, if one bulb burns out, the others will not work.Rate this question:
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- 15.
A drawing that uses symbols to show how the parts of an electric circuit are connected is a/an _____________________________.
- A.
Nichrome wire
- B.
Electric diagram
- C.
Parallel circuit
- D.
Circuit diagram
Correct Answer
D. Circuit diagramExplanation
A circuit diagram is a drawing that uses symbols to represent the different components and connections of an electric circuit. It allows engineers and electricians to understand how the circuit is organized and how the parts are interconnected. This helps in troubleshooting, designing, and analyzing circuits. A circuit diagram is an essential tool in electrical engineering and is used to communicate and document circuit designs.Rate this question:
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- 16.
Which of the following is NOT a good insulator?
- A.
Plastic
- B.
Glass
- C.
Iron
- D.
All of the above
Correct Answer
C. IronExplanation
Iron is not a good insulator because it is a metal and metals are known to be good conductors of heat and electricity. Insulators are materials that do not allow the flow of heat or electricity easily. Plastic and glass are both examples of good insulators as they have high resistivity and do not conduct heat or electricity well.Rate this question:
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- 17.
Which of the following is NOT a good conductor?
- A.
Plastic
- B.
Iron
- C.
Copper
- D.
All of the above
Correct Answer
A. PlasticExplanation
Plastic is not a good conductor of electricity because it is an insulator. Unlike iron and copper, which are metals and have free electrons that can easily carry electric charge, plastic does not have these free electrons. Therefore, it does not allow the flow of electricity and is not a good conductor.Rate this question:
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- 18.
Electric current in a/an _____________________ circuit travels in ONE path.
- A.
Series
- B.
Parallel
- C.
Electric
- D.
Wire
Correct Answer
A. SeriesExplanation
In a series circuit, electric current travels in one path. This means that all the components are connected in a single loop, and the current flows through each component one after the other. In contrast, in a parallel circuit, the current splits into multiple paths, allowing it to flow through different components simultaneously. Therefore, the correct answer is series.Rate this question:
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- 19.
A material through which electric current CANNOT pass easily is a/an ____________________.
- A.
Tester
- B.
Insulator
- C.
Receptor
- D.
Conductor
Correct Answer
B. InsulatorExplanation
An insulator is a material that does not allow electric current to pass through it easily. Unlike conductors, which have high conductivity and allow the flow of electric charges, insulators have high resistivity and restrict the movement of electrons. This property makes insulators useful for electrical insulation and safety purposes, as they prevent the risk of electric shocks and short circuits.Rate this question:
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- 20.
A material through which electric current CAN pass easily in a/an ______________________/
- A.
Tester
- B.
Insulator
- C.
Receptor
- D.
Conductor
Correct Answer
D. ConductorExplanation
A conductor is a material that allows electric current to flow through it easily. Unlike insulators, which resist the flow of electric current, conductors have free electrons that can move easily in response to an applied electric field. This allows the electric charges to flow through the material, making it a good choice for conducting electricity.Rate this question:
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- 21.
A fine wire that becomes hot and produces light when an electric current passes through it is called a _________________.
- A.
Filament
- B.
Nichrome wire
- C.
Circuit
- D.
Wire
Correct Answer
A. FilamentExplanation
A fine wire that becomes hot and produces light when an electric current passes through it is called a filament. This is commonly seen in incandescent light bulbs, where the filament is made of a material that can withstand high temperatures and emit light when heated. The filament's resistance to the electric current causes it to heat up and glow, producing light.Rate this question:
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- 22.
In order for a circuit to work, the path must be __________________.
- A.
Series
- B.
Paralled
- C.
Open
- D.
Closed
Correct Answer
D. ClosedExplanation
For a circuit to work, the path must be closed. This means that there should be a complete loop for the flow of electricity. If the path is open, it means that there is a break or interruption in the circuit, and electricity cannot flow through. In contrast, a closed circuit allows the current to flow through the entire loop, enabling the circuit to function properly.Rate this question:
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- 23.
A/An _____________________ is used to turn the electricity in a current on or off.
- A.
Battery
- B.
Switch
- C.
Conductor
- D.
Insulator
Correct Answer
B. SwitchExplanation
A switch is used to turn the electricity in a current on or off. It is a device that allows or interrupts the flow of electrical current in a circuit. By toggling the switch, the circuit is either completed or broken, controlling the flow of electricity. This makes the switch an essential component in electrical systems, as it provides a convenient way to control the power supply to various devices and appliances.Rate this question:
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- 24.
The flow of electric charge through something is a/an __________________________.
- A.
Electric current
- B.
Circuit tester
- C.
Battery
- D.
Wire
Correct Answer
A. Electric currentExplanation
The flow of electric charge through something is referred to as electric current. Electric current is the movement of electric charge, typically through a conductor, such as a wire. It is measured in units of amperes (A) and is essential for the operation of electrical devices and systems.Rate this question:
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- 25.
A metal strand used to connect electrical devices in a circuit is a/an ________________________.
- A.
Battery
- B.
Switch
- C.
Filament
- D.
Wire
Correct Answer
D. WireExplanation
A metal strand used to connect electrical devices in a circuit is called a wire. It conducts electricity and allows the flow of electrons between different components of the circuit. Unlike a battery, which provides electrical energy, a switch, which controls the flow of electricity, or a filament, which produces light or heat, a wire serves as a conductor to establish the necessary connections in an electrical circuit.Rate this question:
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- 26.
A power source than can produce an elecctric current as a result of a chemical change in it is a/an ______________________.
- A.
Circuit
- B.
Wire
- C.
Battery
- D.
Filament
Correct Answer
C. BatteryExplanation
A battery is a power source that can produce an electric current as a result of a chemical change in it. When a chemical reaction occurs inside the battery, it creates a flow of electrons, which generates an electric current. This current can then be used to power various devices or circuits.Rate this question:
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- 27.
The path for electricity to travel along is a/an ________________________.
- A.
Electric current
- B.
Circuit
- C.
Closed circuit
- D.
Electric diagram
Correct Answer
B. CircuitExplanation
A circuit is the path through which electricity can flow. It is a closed loop that allows the flow of electric current. In a circuit, the electricity travels from a power source, such as a battery or a generator, through conductive materials like wires, and back to the power source. A circuit can be open, meaning it is interrupted and does not allow the flow of electricity, or closed, meaning it is complete and allows the flow of electric current. Therefore, the correct answer is circuit.Rate this question:
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- 28.
A circuit must have which of the following?
- A.
Energy source, battery, something to work
- B.
Energy source, wire, circuit tester
- C.
Energy source, wire, switch
- D.
Energy source, wire, something to work
Correct Answer
D. Energy source, wire, something to workExplanation
A circuit must have an energy source to provide power, wires to transmit the electricity, and something to work, such as a load or device that utilizes the electrical energy. The energy source supplies the necessary voltage or current, the wires serve as conductors to carry the electrical current, and the load or device completes the circuit and converts the electrical energy into a desired form of output.Rate this question:
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- 29.
If the voltage is 12 V and the resistance in the wire is 3 Ω, what is the the current in the circuit?
- A.
6 A
- B.
2 A
- C.
12 A
- D.
4 A
- E.
36 A
Correct Answer
D. 4 AExplanation
The current in a circuit can be calculated using Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the voltage is given as 12 V and the resistance is given as 3 Ω. Therefore, the current can be calculated as 12 V divided by 3 Ω, which equals 4 A.Rate this question:
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- 30.
If the resistance in the circuit is 10 Ω and the current is 3 A, what is the voltage of the battery?
- A.
3 V
- B.
10 A
- C.
30 V
- D.
3.33 V
- E.
0.3 V
Correct Answer
C. 30 VExplanation
The voltage of the battery can be calculated using Ohm's Law, which states that voltage is equal to the product of current and resistance. In this case, the current is given as 3 A and the resistance is given as 10 Ω. Therefore, the voltage of the battery can be calculated as 3 A * 10 Ω = 30 V.Rate this question:
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- 31.
If you connect a 7 V battery to a wire and measure the current to be 2 A, what is the resistance of that wire?
- A.
7 V
- B.
14 A
- C.
14 Ω
- D.
3.5 Ω
- E.
2 Ω
Correct Answer
D. 3.5 ΩExplanation
The resistance of a wire can be calculated using Ohm's Law, which states that resistance (R) is equal to voltage (V) divided by current (I). In this case, the voltage is 7 V and the current is 2 A. Therefore, the resistance of the wire can be calculated as 7 V / 2 A = 3.5 Ω.Rate this question:
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- 32.
If you connect a wire with 18 Ω of resistance to a batter, and measure the current to be 10 A, what is the voltage of the battery?
- A.
18 Ω
- B.
1.8 V
- C.
240 V
- D.
190 A
- E.
180 V
Correct Answer
E. 180 VExplanation
The voltage of the battery can be determined using Ohm's Law, which states that voltage is equal to current multiplied by resistance. In this case, the resistance is given as 18 Ω and the current is measured to be 10 A. By multiplying these values together, we get 180 V, which is the voltage of the battery.Rate this question:
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- 33.
If the voltage of the battery is 5 V and the resistance in the circuit is 2.5 Ω. What is the current?
- A.
2 A
- B.
12.5 A
- C.
2.5 A
- D.
50 V
- E.
0 V
Correct Answer
A. 2 AExplanation
According to Ohm's Law, the current (I) in a circuit can be calculated by dividing the voltage (V) by the resistance (R). In this case, the voltage is 5 V and the resistance is 2.5 Ω. By dividing 5 V by 2.5 Ω, we get a current of 2 A.Rate this question:
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- 34.
What is the resistance in the circuit that is connected to a 63 V battery, and is measured to have a current of 9 A?
- A.
10 A
- B.
7 Ω
- C.
657 Ω
- D.
63 Ω
- E.
7 V
Correct Answer
B. 7 ΩExplanation
The resistance in the circuit can be calculated using Ohm's Law, which states that resistance is equal to voltage divided by current. In this case, the voltage is given as 63 V and the current is given as 9 A. By dividing 63 V by 9 A, we get a resistance of 7 Ω.Rate this question:
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- 35.
If the current equals to 14 A and the resistance is 3 Ω, what is the voltage of the battery?
- A.
4.66 V
- B.
10 A
- C.
42 V
- D.
3 V
- E.
26 Ω
Correct Answer
C. 42 VExplanation
The voltage of the battery can be calculated using Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). In this case, the current is given as 14 A and the resistance is 3 Ω. Therefore, the voltage of the battery can be calculated as 14 A * 3 Ω = 42 V.Rate this question:
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- 36.
Electric current in a/an ____________________ circuit travels in MORE THAN ONE path.
- A.
Series
- B.
Wire
- C.
Parallel
- D.
Connected
Correct Answer
C. ParallelExplanation
In a parallel circuit, the electric current has the ability to travel through multiple paths simultaneously. This is because the components in a parallel circuit are connected side by side, allowing the current to divide and flow through each component independently. As a result, the total current entering the circuit is equal to the sum of the currents flowing through each individual path. Therefore, in a parallel circuit, the electric current travels in more than one path.Rate this question:
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- 37.
In a/an ________________________ circuit, if one bulb burns out, the others will stay lit.
- A.
Parallel
- B.
Series
- C.
Connected
- D.
All of the above
Correct Answer
A. ParallelExplanation
In a parallel circuit, each component is connected separately to the power source, creating multiple paths for the current to flow. This means that if one bulb burns out, the others will stay lit because they are still connected to the power source through their own separate paths. In a series circuit, the components are connected in a single path, so if one bulb burns out, it breaks the circuit and all the other bulbs will go out as well. "Connected" is too vague to determine the behavior of the circuit, and "All of the above" is incorrect as series and connected circuits do not exhibit the same behavior as parallel circuits.Rate this question:
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- 38.
In a _________________________ circuit, if one bulb burns out, the others will not work.
- A.
Parallel
- B.
Series
- C.
Connected
- D.
All of the above
Correct Answer
B. SeriesExplanation
In a series circuit, the components are connected in a single path, one after the other. This means that the current flows through each component in the circuit. If one bulb burns out, it creates an open circuit and interrupts the flow of current, causing the other bulbs to not work.Rate this question:
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- 39.
A drawing that uses symbols to show how the parts of an electric circuit are connected is a/an _____________________________.
- A.
Nichrome wire
- B.
Electric diagram
- C.
Parallel circuit
- D.
Circuit diagram
Correct Answer
D. Circuit diagramExplanation
A circuit diagram is a drawing that uses symbols to represent the different components of an electric circuit and shows how they are interconnected. It provides a visual representation of the circuit, allowing engineers and technicians to understand and analyze its structure and operation. This diagram is essential for troubleshooting, designing, and building electrical circuits.Rate this question:
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- 40.
Which of the following is NOT a good insulator?
- A.
Plastic
- B.
Glass
- C.
Iron
- D.
All of the above
Correct Answer
C. IronExplanation
Iron is not a good insulator because it is a metal and metals are generally good conductors of heat and electricity. Insulators are materials that do not allow the flow of heat or electricity easily. Plastic and glass, on the other hand, are both non-metal materials that have high resistance to the flow of heat and electricity, making them good insulators.Rate this question:
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- 41.
Which of the following is NOT a good conductor?
- A.
Iron
- B.
Copper
- C.
Plastic
- D.
All of the above
Correct Answer
C. PlasticExplanation
Plastic is not a good conductor of electricity because it is an insulator. Unlike iron and copper, which are metals and have free electrons that can easily move and carry electric charge, plastic does not have free electrons and cannot conduct electricity efficiently. Therefore, plastic is not a good conductor.Rate this question:
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- 42.
Electric current in a/an _____________________ circuit travels in ONE path.
- A.
Series
- B.
Parallel
- C.
Electric
- D.
Wire
Correct Answer
A. SeriesExplanation
In a series circuit, electric current travels in one path because the components are connected end to end, forming a single loop. This means that the current flows through each component in the circuit one after the other, without any branches or parallel paths. Therefore, the correct answer is series.Rate this question:
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- 43.
A material through which electric current CANNOT pass easily is a/an ____________________.
- A.
Tester
- B.
Insulator
- C.
Receptor
- D.
Conductor
Correct Answer
B. InsulatorExplanation
An insulator is a material that does not allow electric current to pass easily through it. Unlike conductors, which are materials that allow the flow of electric charge, insulators have high resistance to the flow of electrons. This property makes insulators useful for protecting electrical circuits from short circuits or unwanted electrical currents.Rate this question:
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- 44.
In order for a circuit to work, the path must be __________________.
- A.
Series
- B.
Paralled
- C.
Open
- D.
Closed
Correct Answer
D. ClosedExplanation
For a circuit to work, the path must be closed. A closed circuit means that there is a complete loop for the flow of electric current, allowing it to flow from the power source through the components and back to the source. This ensures that the circuit is complete and can function properly. In contrast, an open circuit means that there is a break or interruption in the path, preventing the flow of current and rendering the circuit non-functional.Rate this question:
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- 45.
What is current electricity?
- A.
Continuous flow of electrons in a circuit
- B.
A charge that is built up then dispersed
- C.
Energy stored within an item, that it then released
- D.
All of the above
Correct Answer
A. Continuous flow of electrons in a circuitExplanation
Current electricity refers to the continuous flow of electrons in a circuit. This flow of electrons is what enables the movement of electric charge and the transfer of energy in electrical systems. It is characterized by the presence of a closed loop or circuit through which the electrons can flow, powered by a source such as a battery or generator. The other options mentioned, such as a charge being built up and dispersed or energy being stored and released, are not specific to current electricity and do not fully capture its definition.Rate this question:
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- 46.
Unlike ___________________ electricity, current electricity needs an energy source and a complete path to follow.
Correct Answer
staticExplanation
Unlike static electricity, current electricity needs an energy source and a complete path to follow. Static electricity refers to the build-up of electric charge on the surface of an object, which can be discharged through contact or other means. In contrast, current electricity involves the flow of electric charge through a conductor, driven by a power source such as a battery or generator. Without an energy source and a complete path, current electricity cannot flow, whereas static electricity can exist without these requirements.Rate this question:
- 47.
An _______ is a device for measuring resistance.
Correct Answer
ohmmeterExplanation
An ohmmeter is a device used for measuring resistance. It works by passing a small current through the component being tested and measuring the voltage drop across it. By using Ohm's law (V = IR), the ohmmeter can calculate the resistance value. This device is commonly used in electronics and electrical engineering to determine the resistance of various components such as resistors, cables, and circuit boards.Rate this question:
- 48.
What is measured by volts?
- A.
Current
- B.
Potential Difference
- C.
Resistance
- D.
Electricity
- E.
None of the above
Correct Answer
B. Potential DifferenceExplanation
The correct answer is Potential Difference. Volts is a unit used to measure potential difference, which is the difference in electric potential energy per unit charge between two points in an electric circuit. It represents the amount of work done to move a unit charge from one point to another in the circuit. Current, resistance, and electricity are all related to the flow of electric charge, but they are not specifically measured in volts.Rate this question:
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- 49.
_____________ can flow when there is a complete circuit.
Correct Answer
Electricity, Electric currentExplanation
Electricity can flow when there is a complete circuit. This means that there is a continuous path for the flow of electric charges. In a complete circuit, there is a source of electricity, such as a battery or power outlet, which provides the potential difference. The electric charges flow through a conductor, such as a wire, and return back to the source, completing the circuit. This flow of electric charges is called current electricity. So, both "Electricity" and "Current Electricity" are correct answers as they describe the phenomenon of electric charges flowing in a complete circuit.Rate this question:
- 50.
Materials through which electricity can pass are called ___________ conductors
Correct Answer
electricalExplanation
The given question asks for a term that describes materials that allow electricity to pass through them. The correct answer, "electrical," accurately describes materials that are capable of conducting electricity.Rate this question:
(627).jpg "What circuit symbol is this?")
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