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ICSE Class 10 Physics Question 11 of 136

Electro-magnetism — Question 1

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Question 1

In the figure given below, when the key is pressed, a current passes in the wire in the direction from A to B (i.e., from south to north). The north pole of the compass needle will deflect towards:

  1. East
  2. North
  3. South
  4. West
In the figure given below, when the key is pressed, a current passes in the wire in the direction from A to B (i.e., from south to north). The north pole of the compass needle will deflect towards: Electromagnetism, Concise Physics Solutions ICSE Class 10.
Answer

West

Reason — When a current passes through a wire from south to north (A to B), it generates a magnetic field around the wire. According to the right-hand rule for electromagnetism, if you wrap your right-hand fingers around the wire in the direction of the current, your thumb will point in the direction of the magnetic field.

So, with the current flowing from A to B, if you curl your fingers around the wire, your thumb would point towards the west. This indicates that the magnetic field is directed towards the west.