NCERT Solution for Class 10 Science Chapter 13 Magnetic Effects of Electric Current
Why does a compass needle get deflected when brought near a bar magnet?
This is because of magnetic field of the bar magnet.
Why do not two magnetic lines of forces intersect each other? [2011,2012,2015]
If the magnetic lines of forces intersect, there will be two different directions of magnetic field at that point, which is not possible.
State the principle of an electric generator.
It is based on the principle of electromagnetic induction in which a changing magnetic field in a conductor induces a current in it.
Name some sources of direct current.
A cell, a battery, a DC generator.