Charged concentric spheres
QUESTION:
A charge is located at the centre of a sphere A (radius R
A = 0.0010 m) which is in
the centre of sphere B (radius R
B = 0.0012m).
Suppose A and B are both equipotential surfaces .
What is the ratio V
A/V
B of the potentials of these surfaces?
Answer
The potential of the inner sphere V
A = kQ/R
A.
The potential of the outer sphere V
B = kQ/R
B
Therefore the ratio V
A/V
B =
R
B/R
A = 0.0012/0.0010 = 1.2
