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1

The breakdown strength of air is approximately:

2

Lightning is an example of:

3

Earthing helps to:

4

Which of the following is a conductor?

5

Charging by friction involves:

6

Which device protects buildings from lightning?

7

Electric field lines end on:

8

Unlike charges:

9

Corona discharge occurs when:

10

When a charged body is earthed, it becomes:

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