COMEDK202510 May 2025Evening ShiftPhysicsMagnetic Effects of CurrentActual
Which physical quantity has the unit joule / tesla?
Options
- AMagnetic dipole moment
- BMagnetic permeability
- CMagnetic Induction
- DMagnetic Susceptibility
Correct answer
A. Magnetic dipole moment
Step-by-step solution
The energy U of a magnetic dipole in an external magnetic field B is given by the relation U = - m B , where m is the magnetic dipole moment and B is the magnetic induction. Rearranging this equation for the magnetic dipole moment m , we get m = U B . The unit of energy U is Joule (J) and the unit of magnetic induction B is Tesla (T). Therefore, the unit of magnetic dipole moment m is Joule per Tesla (J/T). Answer: Magnetic dipole moment