Q. A thin spherical shell of radius is cut into two equal halves and then each of its halves is charged to the same uniform surface charge density . If is the force exerted on each half to keep them at equilibrium, then is proportional to

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A

B

C

D

Solution:

Electrical force per unit area
Projected area
Net electrical force
In equilibrium, this force should be equal to the applied force.

or

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