Ram is pumping 100 metallic charged spheres one by one in a tube whose ends are maintained at a potential difference of 10 V. The work done in pumping these spheres is 50 J. Find the charge on each sphere.

5 x 10² C

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1.6 x 10^–19 C

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1 x 10² C

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5 x 10^–2 C

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Solution

The correct option is D
5 x 10^–2 C

We know that work done, W = qV

50 = 10q

Total charge = q = 5 C

Charge on each sphere = $\frac{T o t a l c h a r g e}{T o t a l n u m b e r o f s p h e r e s}$

= $\frac{5}{100}$ = $5 \times 10^{- 2}$ C

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