Charge on the outer sphere is q and the inner sphere is grounded. The charge on the inner sphere is q ' , for r 2 r 1 . Then

Question

Charge on the outer sphere is q and the inner sphere is grounded. The charge on the inner sphere is q ' , for r 2 > r 1 . Then, q ′ r 1 = q r 2, q ′ = q, q ′ = r 1 r 2 q, q ′ = − r 1 r 2 q

MARKS App · Accepted Answer

Since the inner sphere is grounded, potential of the shell must be zero due to the charges on outer sphere and inner sphere. ⇒ k q ' r 1 + k q r 2 = 0 ⇒ k q ' r 1 = - k q r 2 ⇒ q ' = - r 1 r 2 q

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