MHT CET202123 Sep 2021Evening ShiftPhysicsMagnetic Properties of MatterActual
A bar magnet has length 3 ~cm , cross-sectional area 2 ~cm ^2 and magnetic moment 3 Am ^2 . The intensity of magnetization of bar magnet is
Options
- A2 10^5 ~A / m
- B3 10^5 ~A / m
- C4 10^5 ~A / m
- D5 10^5 ~A / m
Correct answer
D. 5 10^5 ~A / m
Step-by-step solution
aligned & L =3 ~cm =3 10⁻² ~m ^2 & ~A =2 ~cm ^2=2 10⁻⁴ ~m ^2 & M =3 Am ^2 & M _ z Intensity of magnetization & = M L A = 3 Am ^2 3 2 10⁻⁶ ~m ^3 = 1 2 10^6 ~A / m =5 10^5 ~A / m aligned