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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

720 kV

b

240 kV

c

480 kV

d

960 kV

answer is A.

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Detailed Solution

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For outer sphere

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E=VR ⇒V=ER=240 KV

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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 :