Question

STATEMENT-1: For practical purposes, the earth is used as a reference at zero potencial in electrical circuits. and
STATEMENT-2: The electrical potential of a sphere of radius R with charge Q uniformly distributed on the surface is given by `(Q)/(4piepsilon_0R)`.
A. Statement-1. is true , Statement-2 is true , Statement-2 is correct explanation of Statement-1.
B. Statement-1. is true , Statement-2 is true , Statement-2 is not a correct explanation of Statement-1.
C. Statement-1. is correct and Statement-2 is false.
D. Statement-1. is false and Statement -2 is true.

Answer 1

Correct Answer - a
As `V = (Q)/(4pi in_(0) R)`
As radius of earth `(R )` is very large compared to the size of bodies we deal with, therefore, potentail of earth is taken as zero. Choice (a) is correct.