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Figure shows a point charge of 0.5 xx 10...

Figure shows a point charge of `0.5 xx 10^(-6)` C at the center of the spherical cavity of radius 3 cm of a piece of metal. The electric field at

A

A (2 cm from the charge ) is 0.

B

A (2 cm from the charge ) is `1.125 xx 10^7 NC^(-1)`

C

B (5 cm from the charge ) is 0

D

B (5 cm from the charge ) is `1.8 xx 10^6 NC^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B, C
At `A, E = ( 9 xx 10^(9) xx 0.5 xx 10^(-6))/((2 xx 10^(-2))^(2)) = 1.125 xx 10^(7) NC^(-1)`
At `B , E = 0` , because in a metal , electric field is zero.
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