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WorksheetsUnderstanding Ohm's Law and Power
Total questions: 20
Worksheet time: 11mins
A circuit consists of a 12 V battery and a resistor of 4 Ω. What is the current flowing through the circuit according to Ohm's Law?
2 A
3 A
4 A
6 A
If a 60 W light bulb operates on a 120 V supply, what is the resistance of the bulb?
120 Ω
240 Ω
60 Ω
30 Ω
In a series circuit, if the total resistance is 10 Ω and the current is 2 A, what is the total voltage across the circuit?
5 V
10 V
20 V
40 V
What is the power consumed by a device that draws 5 A of current from a 120 V source?
500 W
600 W
720 W
240 W
If a resistor in a circuit has a resistance of 8 Ω and the voltage across it is 16 V, what is the power dissipated by the resistor?
16 W
32 W
64 W
128 W
A circuit has a total power of 100 W and operates at a voltage of 50 V. What is the total current flowing through the circuit?
1 A
2 A
3 A
4 A
In a series circuit with a total voltage of 24 V and a total resistance of 12 Ω, what is the current flowing through the circuit?
1 A
2 A
3 A
4 A
A 100 W device is connected to a 200 V power supply. What is the current flowing through the device?
0.5 A
1 A
1.5 A
2 A
If a circuit has a current of 3 A and a resistance of 5 Ω, what is the voltage across the circuit?
8 V
10 V
15 V
20 V
What is the power consumed by a resistor with a resistance of 10 Ω and a current of 2 A flowing through it?
20 W
40 W
60 W
80 W
In a series circuit, if the total resistance is 15 Ω and the voltage is 45 V, what is the current flowing through the circuit?
1 A
2 A
3 A
4 A
A 75 W device operates on a 25 V power supply. What is the resistance of the device?
5 Ω
8.33 Ω
10 Ω
12.5 Ω
If a circuit has a voltage of 30 V and a current of 3 A, what is the power consumed by the circuit?
60 W
90 W
120 W
150 W
What are the 3 types of electricity?
(a)
What is electricity?
(a)
What is the measure of electricity flow?
Ohms
voltage
amperes
resistance
A substance or material that allows electricity to flow through it?
Resistor
Amperes
Conductor
Volts
Which of the following materials is a good conductor of electricity?
Rubber
Plastic
Iron
Glass
If the voltage across a resistor is doubled, what happens to the current (assuming resistance stays the same)?
It doubles
It halves
It stays the same
It becomes zero
Which of the following devices converts electrical energy into mechanical energy?
Battery
Motor
Generator
Resistor
