A Fun Quiz on Circuit Calculations and Concepts
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What is the basic unit of current?
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Volts
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Watts
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Amps
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Joules
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We welcome you all to this super fun quiz on circuits and concepts. Do you think you know well enough about physics? If you believe so then we highly encourage you to take this fun quiz. All the questions in this quiz will surely make you think! Please make sure to read all the questions carefully before answering. We're so See morecurious to see if you can ace this fun quiz. There's no time limit on this awesome quiz, so feel free to take the quiz as many times as you like. Good Luck!
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- 2.
The flow of electricity through the circuit is known as what?
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Current
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Voltage
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Resistance
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None of the above
Correct Answer
A. CurrentExplanation
The flow of electricity through a circuit is known as current. Current is the movement of electric charge carriers, such as electrons, through a conductor. It is measured in amperes (A) and is responsible for powering electrical devices and creating magnetic fields. Voltage refers to the electrical potential difference that drives the current, while resistance is the opposition to the flow of current in a circuit. "None of the above" is not the correct answer as current accurately describes the flow of electricity.Rate this question:
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- 3.
A resistor consumes about 5 Watts, and a current of 5 Amperes flows through it. What is its voltage?
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15V
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50V
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20V
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5 V
Correct Answer
A. 5 VExplanation
To calculate voltage (U), use the formula U = P/I, where P is power and I is current. Given that the resistor consumes 5 Watts and the current is 5 Amperes, substitute these values into the formula to find the voltage. Thus, U = 5W / 5A = 1V. Therefore, the voltage across the resistor is 1 Volt.Rate this question:
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- 4.
Which of the following formula gives voltage?
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V=I/R
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V=I-R
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V=I+R
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V=I*R
Correct Answer
A. V=I*RExplanation
Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, provided the temperature and other physical conditions remain constant. The constant of proportionality is the resistance (R) of the conductor. Therefore, the formula for voltage is V = I * R.Rate this question:
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- 5.
What slows down the flow of current in a circuit?
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Conductance
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Voltage
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Current
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Resistance
Correct Answer
A. ResistanceExplanation
Resistance is the correct answer because it is a property of a material that opposes the flow of electric current. It is caused by collisions between electrons and atoms in the material, which generates heat and reduces the flow of current. The higher the resistance, the slower the flow of current in a circuit. Conductance, voltage, and current do not slow down the flow of current, but rather affect its magnitude or direction.Rate this question:
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- 6.
Which of the following law are used to find the performance in a circuit?
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Ohm’s law
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Plank’s law
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Newton’s law
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Option 4
Correct Answer
A. Ohm’s lawExplanation
Ohm's law is used to find the performance in a circuit. It states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor. This law is commonly used to calculate the current, voltage, and resistance in a circuit, which helps in analyzing the performance and behavior of electrical circuits.Rate this question:
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- 7.
What is a kilowatt?
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1500 volts
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10000 volts
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1000 volts
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1000 watts
Correct Answer
A. 1000 wattsExplanation
A kilowatt is a unit of power that measures the rate at which energy is used or transferred. It is equal to 1000 watts. Watts are a standard unit of power in the International System of Units (SI), and they represent the amount of energy transferred or used per second. Therefore, the correct answer is 1000 watts, as it accurately defines a kilowatt as a measurement of power.Rate this question:
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- 8.
What does a switch do in a circuit?
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It guides the pathway of the current
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It turns off and on the flow through the circuit
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It enhances the power in the circuit
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It changes the temperature of the circuit
Correct Answer
A. It turns off and on the flow through the circuitExplanation
A switch in a circuit is used to control the flow of current. It can be used to turn the circuit on or off, allowing or interrupting the flow of electricity. By toggling the switch, the circuit can be energized or de-energized, controlling the operation of devices connected to the circuit. Therefore, the correct answer is "It turns off and on the flow through the circuit."Rate this question:
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- 9.
A resistor has 3 volts across it. The resistance of the circuit is 1.5 ohms. What is the current of the circuit?
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20A
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2A
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3A
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200A
Correct Answer
A. 2AExplanation
According to Ohm's Law, the current in a circuit can be calculated by dividing the voltage across the circuit by the resistance. In this case, the voltage across the circuit is 3 volts and the resistance is 1.5 ohms. Therefore, the current of the circuit can be calculated as 3 volts divided by 1.5 ohms, which equals 2A.Rate this question:
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- 10.
A 1-ohm resistor has 5 volts of DC current across its terminals. What are the current (I) and the power consumed by the circuit?
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I = 550A & P = 198W
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I = 5A & P = 25W
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I = 5A & P = 5W
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I = 25A & P = 300W
Correct Answer
A. I = 5A & P = 25WExplanation
With a 1-ohm resistor and 5 volts across its terminals, the current (I) can be found using Ohm's Law (V = IR), yielding I = 5A. Power (P) is determined by P = VI, resulting in P = 25W. Thus, the circuit consumes 5 amperes of current and dissipates 25 watts of power due to the flow of electricity through the resistor.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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Jan 19, 2025Quiz Edited by
ProProfs Editorial Team -
Nov 17, 2022Quiz Created by
Tanya Mishra
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