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Quiz on Domestic Electrical Appliances. 1. A resistance coil is also called. a heating coil. a fuse. an earth wire. a live wire. 2. Which of the following is NOT making use of heating effect of electric current to operate?. Electric heater . Hairdryer. Electric radiator.

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Presentation Transcript
slide2
1. A resistance coil is also called

a heating coil.

a fuse.

an earth wire.

a live wire.

slide3
2. Which of the following is NOT making use of heating effect ofelectric current to operate?

Electric heater

Hairdryer

Electric radiator

Electric doorbell

slide4
3. What is the function of the insulation layer inside the heating element of an electric kettle?

Prevent heat leakage

Separate the heating wire from the metallic tube and prevent electrical leakage.

Speed up boiling of water

Avoid overloading

slide5
4. Which of the following appliance has the heating element hidden and is separated from the other metallic part of the body?

hairdryer

Electric cooker

Electric heater

Electric fan

slide6
5. A device that generate a magnetic effect after being connected to the power supply is known as

A solenoid

An electric breaker

An electromagnet

A doorbell

slide7
6. Which of the following is NOT making use of magnetic effect of electric current to operate?

Electric doorbell

Handset

Washing machine

Oven

slide8
7. Which of the followings are the necessary components for making an electromagnet?

Electricity supply

Long piece of Insulated wire

Iron core

Fuse

Only (i) and (ii)

Only (i) and (iii)

Only (i)、(ii) and (iii)

(i)、(ii) 、(iii) and (iv)

slide9
8.Which of the following appliances DO NOT use a motor to operate?

Blender

Electric iron

Electric fan

Air conditioner

slide11
10. The unit of power is

volt

ampere

watts

ohm

slide13
11. Which of the following is correct?

Current

Current

Current

Current

slide14
12. Which of the following is correct?

Power X Time = Energy

Power X Current = Energy

Power X Time = Voltage

Power X Voltage = Current