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Q1: A sphere with charge Q was placed in, but not touching a larger hollow sphere. If there is any charge initially on the outer sphere; to remove it the outer sphere was earthed momentarily, and then the inner sphere was removed. The charge remaining on the outer sphere was then measured. This charge was found to be __________ to the charge on the inner sphere.

A equal and of same again

B equal and of opposite sign

C unequal and of same sign

D unequal and of opposite sign

ANS:B - equal and of opposite sign

This is true for all sizes of the spheres and for all types of dielectric media between the spheres.



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