State how the mechanical advantages and the efficiency of the inclined plane vary with the inclination of the plane.
Question 2
A large, metallic, spherical shell has no net charge. It is supported on an insulating stand and has a small hole at the top. A small tack with charge Q is lowered on a silk thread through the hole into the interior of the shell. What is the charge on the inner surface of the shell now?
1.Q
2.Q/2
3.0
4.-Q/2
5.-Q