Teaching DSSSB TGT Mock Test 2025 Physics Moving Charges and Magnetism Magnetic Field on the Axis of a Circular Current Loop
The magnetic field at a distance r from a long wire carrying current I is 0.4 T. The magnetic field at a distance 2r is
1
0.1 T
2
0.2 T
3
0.8 T
4
1.6 T