Question

Identify the dimension of electrostatic potential energy from the following.

(a) ML^2T^-3A^-2

(b) ML^3T^-2A^-1

(c) M^-1L^2T^-3A

(d) ML^2T^-3A^-1

The question was asked in homework.

Origin of the question is Potential Energy in an External Field topic in chapter Electrostatic Potential and Capacitance of Physics – Class 12

Answer 1

Right choice is (d) ML^2T^-3A^-1

The explanation: Electrostatic potential energy is a scalar quantity that means it possesses only magnitude and no direction. This quantity is denoted by U and it is measured in joules (J). The dimensional formula of electrostatic potential energy is ML^2T^-3A^-1.