Question

4. For plotting a magnetic field around a bar
magnet, the device used is
(a) magnetic needle
(b) magnetic compass
(c) tracing needle
(d) none of these​

Answer 1

Answer:

Option A is the correct answer

Explanation:

Magnetic needle shows the field in bar magnet by showing deflection

Answer 2

Answer :

Correct Option Is 'B'

Explanation :

In presence of a magnetic field, the needle of a magnetic compass tends to align with earth's magnetic field. If we plot the tip of needle around the bar magnet, it would give us magnetic field lines due to bar magnet.

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