defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Moving Charges and Magnetism Solenoids and Toroids
The magnitude of the magnetic field at a far distance along the axis from the solenoid is proportional to the:
1
square of the radius of the solenoid
2
magnitude of current flowing in it
3
number of turns per unit length
4
All of these