Q.

A hollow conducting sphere has inner radius 5cm and outer radius 8cm then find maximum possible potential of conductor if breakdown electric field of air is 3 x 106 V/m :

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a

240 kV

b

480 kV

c

960 kV

d

720 kV

answer is A.

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Detailed Solution

For outer sphereE=VR ⇒V=ER=240 KV
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