NTA Abhyas JEE Main2020PhysicsMagnetic Properties of MatterPractice
A paramagnetic material shows a net magnetization of 8 A m -1 when placed in an external magnetic field of intensity 0 .6 T at a temperature of 4   K . When the same material is placed in an external magnetic field of intensity 0 .2 T at a temperature of 16 K , the magnetization will be
Options
- A32 3   A   m - 1
- B2 3 A m - 1
- C6   A   m - 1
- D2.4   A   m - 1
Correct answer
B. 2 3 A m - 1
Step-by-step solution
According to Curie's law, Magnetization, I ∝ Magnetic   Induction ( B ) A b s o l u t e   t e m p e r a t u r e ( T ) ⇒ I 2 I 1 = B 2 T 1 B 1 T 2 ⇒ I 2 8 = 0 . 2 × 4 0 . 6 × 16 ⇒ I 2 = 2 3   A   m - 1