Electricity And Ohms Law Questions
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What is the unit for voltage?
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Volts
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Amperes
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Ohms
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Joules
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Explore the fundamentals of electricity and Ohm's Law in this engaging quiz. Test your knowledge on units of voltage, current, and resistance, and apply Ohm's Law to practical problems, enhancing your understanding of electrical principles.
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- 2.
What is the unit for current?
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Volts
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Amperes
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Ohms
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Joules
Correct Answer
A. AmperesExplanation
The unit for current is amperes. Current is a measure of the flow of electric charge in a circuit. It represents the rate at which charges move through a conductor. Amperes, symbolized by A, is the standard unit for measuring electric current. Volts, ohms, and joules are not units of current. Volts measure electric potential difference, ohms measure resistance, and joules measure energy.Rate this question:
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- 3.
What is the unit for resistance?
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Volts
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Amperes
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Ohms
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Joules
Correct Answer
A. OhmsExplanation
The unit for resistance is ohms. Resistance is a measure of how much a material or device impedes the flow of electric current. It is represented by the symbol Ω and is named after the German physicist Georg Simon Ohm. Ohms is the standard unit used to quantify resistance in electrical circuits. Volts, amperes, and joules are all units used to measure other electrical quantities such as voltage, current, and energy respectively.Rate this question:
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- 4.
Which of these is the equation for Ohm's Law?
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W = Fd
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V = IR
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R = IV
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PE = mgh
Correct Answer
A. V = IRExplanation
Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing through it, and inversely proportional to the resistance of the conductor. The equation V = IR represents this relationship, where V is the voltage, I is the current, and R is the resistance.Rate this question:
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- 5.
A certain steam iron carries a current of 6.4 A when connected to a 120 V source. What is the resistance of the steam iron?
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1.875 Ω
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0.05 Ω
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768 Ω
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18.75 Ω
Correct Answer
A. 18.75 ΩExplanation
When a current of 6.4 A flows through a steam iron connected to a 120 V source, the resistance of the steam iron can be calculated using Ohm's Law, which states that resistance (R) is equal to voltage (V) divided by current (I). Therefore, the resistance of the steam iron is calculated as 120 V / 6.4 A = 18.75 Ω.Rate this question:
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- 6.
The resistance of a hotplate is 48 Ω . How much current does the plate carry when connected to a 120-V source?
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120 A
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2.5 A
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5760 A
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0.4 A
Correct Answer
A. 2.5 AExplanation
The current flowing through 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 120 V and the resistance is given as 48 Ω. By substituting these values into the formula, we can calculate the current as 2.5 A.Rate this question:
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- 7.
A typical size-D battery has about how many volts?
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0.05 V
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100 V
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1.5 V
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9 V
Correct Answer
A. 1.5 VExplanation
A typical size-D battery has a voltage of 1.5 V. This is a common voltage rating for many household batteries, including AA, AAA, C, and D batteries. The voltage rating indicates the electrical potential difference between the positive and negative terminals of the battery. A higher voltage rating means the battery can deliver more electrical energy, while a lower voltage rating means it has a lower capacity. In the case of a size-D battery, it is designed to provide a steady 1.5 V output for devices that require a higher power supply.Rate this question:
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- 8.
Voltage is a measurement of what?
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Radiant energy of a lightbulb in a circuit
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Kinectic energy of a motor in a circuit
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Potential energy stored in a battery
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The flow of electrons
Correct Answer
A. Potential energy stored in a batteryExplanation
Voltage is a measurement of potential energy stored in a battery. Voltage represents the amount of electric potential energy per unit charge that is available in a circuit. In the case of a battery, it stores chemical potential energy, which is converted into electrical potential energy when a circuit is connected. This potential energy drives the flow of electrons, creating an electric current. Therefore, voltage is a measurement of the potential energy that can be converted into electrical energy in a circuit.Rate this question:
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- 9.
Electrical Power is measured in :
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Watts
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Amperes
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Volts
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Meters
Correct Answer
A. WattsExplanation
Electrical power is measured in watts. Watts is the unit of power and it represents the rate at which energy is consumed or produced. It is calculated by multiplying the voltage (in volts) by the current (in amperes). Watts is commonly used to measure the power output or consumption of electrical devices and systems.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Jan 02, 2018Quiz Created by
Abbas Aburaida
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