Transcript Quiz on Domestic Electrical Appliances

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
Electric doorbell
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
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
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
6. Which of the following is NOT making use of
magnetic effect of electric current to operate?
Electric doorbell
Handset
Washing machine
Oven
7. Which of the followings are the necessary
components for making an electromagnet?
Only (i) and (ii)
(i) Electricity supply
(ii) Long piece of Insulated wire
Only (i) and (iii)
(iii) Iron core
(iv) Fuse
Only (i)、(ii) and (iii)
(i)、(ii) 、(iii) and (iv)
8. Which of the following appliances DO NOT
use a motor to operate?
Blender
Electric iron
Electric fan
Air conditioner
9. Which of the following is correct?
10. The unit of power is
volt
ampere
watts
ohm
11. Which of the following is correct?
11. Which of the following is correct?
Current =
𝑟𝑒𝑠𝑖𝑠𝑡𝑎𝑛𝑐𝑒
𝑉𝑜𝑙𝑡𝑎𝑔𝑒
Current=
𝑉𝑜𝑙𝑡𝑎𝑔𝑒
𝑟𝑒𝑠𝑖𝑠𝑡𝑎𝑛𝑐𝑒
Current=
𝑉𝑜𝑙𝑡𝑎𝑔𝑒
𝑃𝑜𝑤𝑒𝑟
Current=
𝑃𝑜𝑤𝑒𝑟
𝑉𝑜𝑙𝑡𝑎𝑔𝑒
12. Which of the following is correct?
Power X Time = Energy
Power X Current = Energy
Power X Time = Voltage
Power X Voltage = Current
13. What does a kilowatt-hour meter measure?
current
energy
power
voltage