MHT CET20244 May 2024Evening ShiftPhysicsMagnetic Properties of MatterActual
A magnetic intensity of 500 ~A / m , produces a magnetic flux of 2.4 10⁻⁵ . Wb in an iron bar of cross-sectional area 0.4 ~cm ^2 . The magnetic permeability of the iron bar is
Options
- A2.4 10⁻³ ~N / m ^2
- B1.2 10⁻³ ~N / m ^2
- C2.4 10⁻⁴ ~N / m ^2
- D1.2 10⁻⁴ ~N / m ^2
Correct answer
B. 1.2 10⁻³ ~N / m ^2
Step-by-step solution
Permeability of iron bar, aligned & = B H = ( / A ) H = HA = 2.4 10⁻⁵ 500 (0.4 10⁻⁴ ) & =1.2 10⁻³ ~N / m ^2 aligned