defence exam Army Havildar SAC Mock Test Series 2025 Physics Moving Charges and Magnetism Motion in a Magnetic Field
A 2.0 m long metallic rod is rotated with an angular frequency of 100 rad/s about an axis normal to the rod and passing through its one end. A uniform magnetic field of 2.0 T exits parallel to the axis. The emf induced between the two ends of the rod is:
1
200 V
2
20 V
3
400 V
4
40 V