ElectrostaticsHard

Question

Three concentric conducting spherical shells have radius r, 2r and 3r, and Q1, Q2 and Q3 are final charges respectively. Innermost and outermost shells are already earthed as shown in figure. choose the wrong statement

Options

A.Q1 + Q3 = - Q2
B.Q1 =
C. = 3
D.

Solution


Potential at outermost shell
= 0
⇒ Q1 + Q2 + Q3 = 0            ....(i)
and potential at innermost surface
= 0
⇒ = 0
From eq. (i) & (ii) Q1 =  and also = 3.

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