Electrical Resistance Worksheet
Explore the concepts of electrical resistance, Ohm's Law, and factors affecting resistance with this Grade 8 science worksheet.
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Electrical Resistance Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. What is electrical resistance?
The flow of electrons in a circuit.
The opposition to the flow of electric current.
The amount of voltage in a circuit.
The power consumed by an electrical device.
2. Which of the following units is used to measure electrical resistance?
Ampere (A)
Volt (V)
Ohm (Ω)
Watt (W)
3. According to Ohm's Law, Voltage = Current × .
4. Materials that have high resistance are called .
5. The longer a wire is, the its resistance.
6. A thick wire has less resistance than a thin wire of the same material and length.
True
False
7. Increasing the temperature of a conductor generally decreases its resistance.
True
False
8. State Ohm's Law and write down its formula.
9. A circuit has a voltage of 12V and a current of 2A. What is the resistance of the circuit?
10. Look at the image below of a parallel resistance diagram. Describe how the total resistance of parallel resistors is generally different from series resistors.
