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ICSE Class 10 Physics Question 11 of 27

Solved Sample Paper 4 — Question 25

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Question

Question 3(iii)

The diagram below shows a coil connected to the centre zero galvanometer.

The diagram shows a coil connected to the centre zero galvanometer. What polarity is induced at point X when (a) the magnet is moved towards the coil (b) the magnet is moved away from the coil? Physics Sample Paper Solved ICSE Class 10.

What polarity is induced at point X when

(a) the magnet is moved towards the coil

(b) the magnet is moved away from the coil?

Answer

(a) South pole

Reason — A moving south pole of a magnet near a coil induces a current. The induced current creates a magnetic field opposing the change, following Lenz's law. This leads to the coil's side facing the south pole developing a south pole as well.

(b) North pole

Reason — Moving a magnet's south pole away from a coil induces a current. The induced current creates a magnetic field opposing the change, following Lenz's law. This leads to the coil's side facing the south pole developing a north pole.