First slide

Equipotential surfaces

Question

A metallic sphere bas a charge of 10 μC. 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 is

Moderate

A

zero
B

2/10 joule
C

-2/10 joule
D

-1/10 joule

Solution

$Since V_{A} = V_{B} so W_{A \to B} = 0$

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