There is a cubicle cavity inside a conducting sphere of radius R A positive point charge Q is placed at the center of the cube and another charge q is placed at a distance l (>R)from the center of Sphere. The sphere is earthed.


28. Charge induced on the inner surface of cavity is


 A. -Q, uniformly distributed B.  -Q, non-uniformly distributed  C . -(Q+q), non-uniformly distributed D. None

29. Net charge on the outer surface of conducting surface is

A. + Q B. B. Q- qR/l  C. -qR/l  D.None

30. Potential at a point inside the cavity is:
 
A. A. Zero B. Positive C. negative D. can not be determine

There is a cubicle cavity inside a conducting sphere of radius R A positive point charge Q is placed at the center of the cube and another charge q is placed at a distance l (>R)from the center of Sphere. The sphere is earthed.28. Charge induced on the inner surface of cavity is A. -Q, uniformly distributed B.  -Q, non-uniformly distributed  C. -(Q+q), non-uniformly distributed D. None 29. Net charge on the outer surface of conducting surface is A. + Q B. B. Q- qR/l  C. -qR/l  D.None 30. Potential at a point inside the cavity is:   A. A. Zero B. Positive C. negative D. can not be determine to