Question

A metallic sphere has a charge of 10µC. A unit

negative charge is brought from (A) to (B), both

100 cm away from the sphere but (A) being

east of it while (B) being on west. The net work

done on the unit negative charge is​

Answer 1

Answer:

According to question,

Work done =W (Change in potential energy )

W=U

f

−U

i

U

i

=

4πC

1

1

1×10×10

−6

(U

i

is the initial potential energy when unit is lying east)

U

f

=

4πC

1

1

1×10×10

−6

(U

f

is the final potential energy when unit is lying west)

W=

4πC

1

1

1×10×10

−6

−

4πC

1

1

1×10×10

−6

=0

W=0

Answer 2

Explanation:

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