Concepts Of Physics MCQ Edition [Volume 2]PhysicsMagnetic Properties of Matter
Identify the pair(s) of physical quantities that possess identical dimensions.
Options
- AMagnetizing field intensity H and intensity of magnetization I
- BMagnetic field B and intensity of magnetization I
- CLongitudinal strain and magnetic susceptibility
- DMagnetic field B and magnetizing field intensity H
Correct answer
C. Longitudinal strain and magnetic susceptibility
Step-by-step solution
Magnetizing field intensity H and intensity of magnetization I both have dimensions [L⁻¹ A] . Longitudinal strain is the ratio of change in length to original length, making it a dimensionless quantity [M⁰ L⁰ T⁰] . Magnetic susceptibility is defined as the ratio of intensity of magnetization to magnetizing field intensity ( = I H ). Since both I and H have the same dimensions, is also dimensionless [M⁰ L⁰ T⁰] . Magnetic field B has dimensions [M T⁻² A⁻¹] , which differs from I and H . Therefore, the pairs of physic