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Question

When a diamagnetic substance is inserted in a current carrying coil, the magnetic field inside the substance is:
  1. increased
  2. decreased
  3. unchanged
  4. increased or decreased depending upon the relative volume of the substance.

A
decreased
B
unchanged
C
increased or decreased depending upon the relative volume of the substance.
D
increased
Solution
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Factual. The field decreases when a diamagnetic substance is inserted since all dipoles don't align in direction of field.

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