# A spherical shell of radius R = 1.5 cm has q = 20 $\mu C$ uniformly distributed over it. The force exerted by one half over  the other half is Option 1) 0 Option 2) 10-2 N Option 3) 500 N Option 4) 2000 N

A Avinash

As we learned @3399

$\\*E=\frac{\sigma }{2\epsilon 0}\Rightarrow F=E.dr=\frac{\sigma dA\sigma }{2\epsilon 0}\\*P=\frac{F}{dA}=\frac{\sigma ^{2}}{2\epsilon 0}\\*F=P\pi R^{2}=\frac{\sigma ^{2}}{2\epsilon 0}.\pi R^{2}=\frac{Q^{2}}{32\pi \epsilon 0R^{2}}=2000N$

Option 1)

0

Option 2)

10-2 N

Option 3)

500 N

Option 4)

2000 N

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