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5. Magnetism and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics5. Magnetism and matter1 Mark
MCQ
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
  • A
    $B_s\, =-B$
  • ✓
    $B_s\, =0$
  • C
    $B_s\, = B$
  • D
    $B_s\, < B$ but $B_s \ne 0$
✓

Answer

Correct option: B.
$B_s\, =0$
b
Magnetic field inside the superconductor is zero . Diamagnetic substances are repelled in external magnetic field

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