Name some electric appliances where the heating effect of the electric current is used.

2

(a)

If the current through the coil stops flowing. Will the coil remain an electromagnet?

2

(a)

State whether the bulb glows when the circuit is opened.

2

(a)

What happens to the current in a circuit at the time of short circuit?

2

(a)

We should not touch the lighted bulb. Explain, why.

2

(a)

Explain the construction of battery

2

(a)

What do you mean by open circuit?

2

(a)

Why should we not touch the lighted bulb?

2

(a)

What is a closed circuit with respect to the on off switch?

2

(a)

Explain the reasons of excessive currents in our houses.

2

(a)

What are MCBs ?How do they work?

2

(a)

Why do we cover plug pin holes which are within the reach of children with cellotape or plastic cover when not in use?

2

(a)

Draw the symbols components :
(i) electric cell
(ii) switch in off position
(iii) electric bulb
(iii) battery

2

(a)

Can we use the same fuse in geyser and a television set? Explain.

2

(a)

Unscramble the following words:
(i) Tbtayer
(ii) Sfeu
(iii) Htrco
(iv) lewts

2

(a)