Lesson Worksheet: Cables and Plugs Physics
In this worksheet, we will practice describing how to wire a plug.
Q1:
A standard UK plug has three wires.
What color is the neutral wire?
- AYellow
- BGreen and yellow
- CBlue
- DBrown
- EGreen
What color is the live wire?
- ABrown
- BGreen
- CGreen and yellow
- DYellow
- EBlue
What color is the earth wire?
- AYellow
- BBlue
- CGreen and yellow
- DBrown
- EGreen
Q2:
Which of the following statements correctly explains the purpose of the live wire in a standard UK plug?
- AThe live wire is for safety; it prevents the casing of the device from becoming live; it only carries a current when there is a fault.
- BThe live wire provides the alternating potential difference that powers the device.
- CThe live wire completes the circuit of the device; the potential difference between the live wire and Earth is 0 V.
Q3:
Which of the following materials is suitable for use as an electrical wire?
- AUranium
- BSulfur
- CArgon
- DPotassium
- ECopper
Q4:
Electrical wires are often made of a copper core covered in a thin plastic coating.
Which of the following are reasons why copper is chosen as the material for the core of the wire?
- It is a good thermal conductor.
- It is very cheap.
- It is ductile.
- It is very light.
- It is a good electrical conductor.
- Ac and d
- Ba and b
- Cc and e
- Dd and e
- Ea and e
Why is plastic used as the coating for the wire?
- ABecause it is a good electrical conductor
- BBecause it is ductile
- CBecause it is easy to make into different colors
- DBecause it is a good thermal conductor
- EBecause it is an electrical insulator
Q5:
Which of the following statements correctly explains the purpose of the earth wire in a standard UK plug?
- AThe earth wire provides the alternating potential difference that powers the device.
- BThe earth wire is for safety; it prevents the casing of the device from becoming live. It only carries a current when there is a fault.
- CThe earth wire completes the circuit of the device.
Q6:
Which of the following statements correctly explains the purpose of the neutral wire in a standard UK plug?
- AThe neutral wire provides the alternating potential difference that powers the device.
- BThe neutral wire is for safety. It prevents the casing of the device from becoming live. It only carries a current when there is a fault.
- CThe neutral wire completes the circuit of the device. The potential difference between the neutral wire and earth is 0 V.
Q7:
In a standard UK plug, what is the potential difference between the live wire and the neutral wire?
Q8:
In a standard UK plug, what is the potential difference between the live wire and earth?
Q9:
In a standard UK plug, what is the potential difference between the neutral wire and earth?
Q10:
What type of electrical current is provided by a 1.5 V alkaline battery?
- ADirect current
- BPulsating current
- CRectified alternating current
- DAlternating current
- EVariable current
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