Question

Assertion: With the help of compass, magnetic field lines can be traced outside the bar magnet.

Reason: The north pole of a compass needle always points towards the south pole of the magnet when bought close to it.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

Explanation:

A compass needle aligns itself along the magnetic field lines, so it helps in tracing them around a bar magnet. The north pole of the compass is attracted towards the south pole of the magnet, indicating the direction of the field. Thus, the reason correctly explains why a compass can be used to trace magnetic field lines.