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NEETPhysicsMagnetic Effects of Current

STATEMENT-1: When radius of circular loop carrying current is doubled its magnetic moment becomes four times. STATEMENT-2: Magnetic moment depends on area of the loop.

Options

  1. AStatement - 1 is True, Statement - 2 is True; Statement - 2 is a correct explanation for Statement - 1.
  2. BStatement - 1 is True, Statement - 2 is True; Statement - 2 is NOT a correct explanation for Statement - 1.
  3. CStatement - 1 is True, Statement - 2 is False.
  4. DStatement - 1 is False, Statement - 2 is True.

Correct answer

A. Statement - 1 is True, Statement - 2 is True; Statement - 2 is a correct explanation for Statement - 1.

Step-by-step solution

Initially moment ( M = I r ^2 ) And afterwards ( M ^ = I (2 r )^2 ) (=4 I ( r ^2 )=4 M ) So magnetic moment becomes four times when radius is doubled.

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