JEE Main 2014 · 19 Apr · Shift 1 · Physics Q20

← JEE Main 2014 · 19 Apr · Shift 1

PhysicsSingle correct+4 / -1Question 20 of 90

An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity B, the magnetic field $B_s$ inside the superconductor will be such that :

B_s=-B

B_s=0

B_s=B

B_s<B

but

B_s\ne0

Answer and worked solution

Official answer: B

A perfect diamagnet has $\chi=-1$ , so $B_s=\mu_0(1+\chi)H=0$ : the field is completely expelled (Meissner effect).

Topics:Magnetic materials

← Previous question Next question →

JEE Main 2014 · 19 Apr · Shift 1, Physics question 20