Let there be a non-conducting infinite large sheet of charge of surface charge density $\frac{1}{36 π} nC / m^{2}$ . An uncharged conducting spherical shell of radius 20 cm is placed in front of sheet. A point charge 6mC is placed at centre of the shell. Force on point charge due to shell is x mN. Find value of x

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TestHub · Accepted Answer

The external sheet field induces surface charge on the conducting shell but is screened inside.

The force on the centered charge due to induced shell charge cancels the sheet field contribution inside the cavity.

$F = 3 m N$

$x = 3$

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