2. Answer the following questions in short:

1. State heatingeffect of current. give some applications of it.



2. State any three uses of
electromagnet.

3. Draw the circuit symbols for

(a) Switch in ON position
(b) Bulb
(c) Battery of three cells

4. What are the factors on which heating effect of electric current depends?

5. Why is fuse necessary in a circuit? Explain its working.
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