Fundamentholfundamenthol
JEE Main2019Physics
Q.

A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The coactivity of the bar magnet is :

  1. A

    1200 A/m

  2. B

    2600 A/m

  3. C

    520 A/m

  4. D

    285 A/m

Solution

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