Question

What is the dimension of the dipole moment?

(a) [L T I]

(b) [L T I^2]

(c) [M L T I]

(d) [L T I^-1]

This question was posed to me in an online interview.

The doubt is from Electric Dipole topic in section Charges and Fields of Physics – Class 12

Answer 1

Right option is (a) [L T I]

For explanation I would say: The dipole moment is defined as the product of a charge and distance. The dimension of charge (current*time) is [I T] and the dimension of distance is [L]. Therefore the dimension of dipole moment is [L T I]. Its unit in the CGS and the SI system are esu*cm and C*m respectively.