Question

A cyclic wheel with 64 spokes is rotating with N rotations per second at right angles to horizontal component of earth’s magnetic field. The induced emf generated between its axle and rim is E. If the number of spokes is reduced to 32 and makes N rotations per second then the value of induced emf will be

• A. E
• B. 2E
• C. E/2
• D. E/4

Answer 1

The correct option is A

E

The value of induced emf generated between its axle and rim is independent of the number of

spokes in a given wheel as E = 1/2 $Bw{l}^2$