Q.

A uniformly charged thin spherical shell of radius R carries uniform surface charge density of σ per unit area. It is made of two hemispherical shells, held together by pressing them with force F. F is proportional to

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a

1εoσ2R2

b

1εoσ2R

c

1ε0σ2R

d

1ε0σ2R2

answer is A.

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Detailed Solution

Pressure =σ22ε0 and Force =σ22ε0×πR2

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A uniformly charged thin spherical shell of radius R carries uniform surface charge density of σ per unit area. It is made of two hemispherical shells, held together by pressing them with force F. F is proportional to