Question

which rule helps in finding the direction of deflection???​

Answer 1

NCERT IN-TEXT QUESTIONS SOLVED

1. Why does a compass needle get deflected when brought near a bar magnet?

Ans. A compass needle is a small bar magnet with north and south pole. The compass needle deflects due to repulsion/attraction with the bar magnet.

2. Draw magnetic field lines around a bar magnet.

Ans.

Answer 2

no rule is required it is find by oerseted experiment or you can find it by snow rule