Q.

A resistance of frustum shape is shown in figure. If a current i passes through the resistance, the electric field at A and B are related as

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a

EA>EB

b

EB>EA

c

EA=EB

d

There is no relation

answer is A.

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Detailed Solution

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: From ohm’s law electric field α  current density

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A resistance of frustum shape is shown in figure. If a current i passes through the resistance, the electric field at A and B are related as