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  4. 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 Bs inside the superconductor will be such that:

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Q. 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:

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Solution:

Magnetic field inside the superconductor is zero. Diamagnetic substances are repelled in external magnetic field.