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The electrostatic field due to a point c...

The electrostatic field due to a point charge depends on the distance r as `1/r^2`. Indicate which of the following quantities shows same dependence on r.

A

intensity of light from a point source

B

electrostatic potential due to a point charge

C

electrostatic potential at a distance r from the center of a charged metallic sphere, given rltradius of the sphere

D

none of these

Text Solution

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The correct Answer is:
A
a. `I prop 1/(r^2), V prop 1/r, V prop r^0` for metallic sphere, at inside, at inside point.
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