Electrical Resistance Worksheet
Explore the concept of electrical resistance, its factors, and its role in circuits with this Grade 7 Science worksheet.
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Electrical Resistance Worksheet
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show your work where applicable.
1. What is electrical resistance?
The flow of electrons
The opposition to the flow of electric current
The amount of voltage in a circuit
The power consumed by a device
2. Which of the following materials is a good conductor of electricity (low resistance)?
Rubber
Wood
Copper
Plastic
3. The unit of electrical resistance is the .
4. Longer wires generally have resistance than shorter wires.
5. Thicker wires generally have resistance than thinner wires.
6. Look at the circuit diagram. If the light bulb has a high resistance, what impact will this have on the brightness of the bulb?
7. Explain why electrical wires are often made of copper.
8. Insulators have very low electrical resistance.
True
False
9. Resistance generates heat in an electrical circuit.
True
False
Match the term with its definition.
10. Conductor
a. Material with very high resistance
11. Insulator
b. Material with very low resistance
12. Resistor
c. Component designed to add resistance to a circuit