Physics 0625 · IGCSE · Electromagnetic effects

Electromagnetic effects — practice question

A length of soft iron XY is wrapped with a coil of wire. The N pole of a bar magnet is moved away from end X, causing an induced current to flow in the coil. The magnet is then turned around so that the N pole is on the left. It is brought to the other end of the soft iron and the N pole is pushed towards end Y. Another current is induced in the coil. Which statement is correct?

  • AThe new induced current is in the opposite direction and causes the soft iron to attract the N pole.
  • BThe new induced current is in the opposite direction and causes the soft iron to repel the N pole.
  • CThe new induced current is in the same direction and causes the soft iron to attract the N pole.
  • DThe new induced current is in the same direction and causes the soft iron to repel the N pole.

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