Q1 of 39 Page 238

Name two safety measures commonly use in electric circuits and appliances.

The two safety measures that are commonly used in electric circuits and appliances are:

a) Make a Provision for electric fuse


b) Earthing of metal bodies of electrical appliances is must.


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3

Which sources produce alternating current?

 4

Choose the correct option:

A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced cum changes once in each:


(a) two revolutions


(b) one revolution


(c) half revolution


(d) one-fourth revolution

 2

An electric oven of 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.

 3

What precautions should be taken to avoid the overloading of domestic electric circuits?