If you bring a permanent magnet to the compass needle, it will deviate from the -North -Yug- direction.

If you bring a permanent magnet to the compass needle, it will deviate from the -North -Yug- direction. Will the arrow deflect when an iron bar is brought up to it? copper bar?

The needle of a magnetic compass is made magnetized. Those. this needle is itself a permanent magnet.

The magnetic field of the Earth acts on the magnetic needle by rotating forces that unfold the arrow along the magnetic lines of the Earth.

If you bring an iron bar close to the magnetic arrow, then the magnetic field of the arrow can magnetize the iron and another force appears, attracting the arrow to the bar. In this case, the arrow may deviate.

A copper bar does not possess magnetic properties, therefore, its approach to the arrow does not deflect it.