Question

2. What happens when the switch is 'on' in an electric circuit?
a. The circuit is open and current flows through it.
b. The circuit is closed and current does not flow through it.
C. The circuit is closed and current flows through it.
d. The circuit is open and current does not flow through it.
3. Why does the filament of an incandescent bulb glow?
a. It is the heating effect of electric current.
b. It is the magnetic effect of electric current.
c. An electric fuse is connected to it.
d. An electromagnet is connected to it.
4. What is the part of a heating appliance containing a tightly wound coil, that heats
up, called?
a. Electric iron b. Element
C. Electromagnet d. Fuse
5. What is an electric fuse?
a. An electromagnetic device
b. A safety device
C. A source of current
d. An element
6. What is the role of an electric switch?
a. To open or close an electric circuit b. To produce heat
c. To make a magnet
d. To provide a path for the flow of current
7. How many electric cell(s) an electric battery consists of?
a. Only one b. Only two
C. Only five
d. Two or more
8. What effect of current do an electric toaster and a filament light bulb use?
a. The heating effect of electric current b. The magnetic effect of electric current
c. Both a and b
d. Neither a norb
9. What happens when an electric current is passed through a coil wrapped around an
iron piece?
a. The iron piece becomes rubbery. b. The iron piece becomes hard.
C. The iron piece becomes magnetic. d. The iron piece becomes soft.​

Answer 1

Explanation:

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