Question

You are given a magnetised bar and a compass needle.How will u mark polarity at the ends of bar?

Answer 1

$\huge\mathfrak\color{lightcoral}{\underline{\underline{Answer}}}$

The two ends of the bar are brought near the north pole of the compass needle one by one. The end of the bar which repels the north pole of the compass needle will be the north pole, while the end of the bar which attracts the north pole of the compass needle will be the south pole.

Answer 2

Answer:

the answer is given in the attachment.