Question

what is meant by a magnetic field on what factor does the strength of magnetic field depend​

Answer 1

Explanation:

on the size of magnet

Answer 2

If source is magnet, then it depends on

• dipole moment of magnet

• distance of observation point from the magnet

• medium surrounding magnet.

If source is current carrying conductor or a coil, then it depends on

• current in conductor or coil

• distance of observation point from conductor or coil

• medium surrounding magnet.

If source a long straight solenoid then it depends on

• current in solenoid.

• number of turns per unit length of solenoid

• medium of the core of solenoid.

Magnetic field inside the long solenoid is approximately constant inside the solenoid, thus in this case it does not depends on the position inside the solenoid.