JEE Main202228 Jun 2022Evening ShiftPhysicsMagnetic Properties of MatterActual
The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to 1 . 2 × 10 - 5 . What is fractional increase in the magnetic field inside solenoid with respect to air as medium inside the solenoid?
Options
- A1 . 2 × 10 - 5
- B1 . 2 × 10 - 3
- C1 . 8 × 10 - 3
- D2 . 4 × 10 - 5
Correct answer
A. 1 . 2 × 10 - 5
Step-by-step solution
Given here, χ = 1 . 2 × 10 - 5 Magnetic field inside the material in solenoid is B ' = μ 0 1 + χ n i , here, i is current. Now, magnetic field with air as medium inside solenoid is B = μ 0 n i . So, fractional increase is B ' - B B = χ = 1 . 2 × 10 - 5