Two thin spherical shells, one with radius R and the other with radius 2R, surround an isolated charge point particle.The ratio of the number of field lines through the larger sphere to the number through the smaller is:
A)1
B)2
C)4
D)1/2
E)1/4

Question

Quizplus · Accepted Answer

The number of field lines through both spheres is the same because electric field lines originate from or terminate on charges, and the number of lines is proportional to the magnitude of the charge enclosed. Both spheres enclose the same charge, so the ratio is 1:1.

Two Thin Spherical Shells, One with Radius R and the Other