JEE Main201911 Jan 2019Evening ShiftPhysicsMagnetic Properties of MatterActual
A paramagnetic substance in the form of a cube with sides 1 ~cm has a magnetic dipole moment of 20 10⁻⁶ ~J / T when a magnetic intensity of 60 10³ ~A / m is applied. Its magnetic susceptibility is:
Options
- A3.3 10⁻²
- B4.3 10⁻²
- C2.3 10⁻²
- D3.3 10⁻⁴
Correct answer
D. 3.3 10⁻⁴
Step-by-step solution
Magnetic susceptibility, = I H where, I = Magnetic moment Volume = 20 10⁻⁶ 10⁻⁶ =20 ~N / m ² Now , = 20 60 10³ = 1 3 10⁻³=3.3 10⁻⁴