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ICSE Class 10 Physics Question 19 of 136

Electro-magnetism — Question 9

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9
Question

Question 9

On reversing the direction of current in a wire, the magnetic field produced by it:

  1. gets reversed in direction
  2. increases in strength
  3. decreases in strength
  4. remains unchanged in strength and direction.
Answer

gets reversed in direction

Reason — By reversing the direction of current in a wire, the magnetic field produced by it gets reversed in direction because the polarity of the faces of the wire gets reversed.