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The insulation property of air breaks do...

The insulation property of air breaks down at `E = 3 xx 10^(6) V//m`. The maximum charge that can be given to a sphere of diameter 5 m is approximately (in coluombs)

A

`2 xx 10^(-2)`

B

`2 xx 10^(-3)`

C

`2 xx 10^(-4) `

D

`2 xx 10^(-5)`

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The correct Answer is:
B
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