A wheel with 8 matallic spokes each 50 cm long is rotated with a speed of 120 `rev//min`
Channel: Doubtnut
Date: 2020-08-02

A wheel with 8 matallic spokes each 50 cm long is rotated with a speed of 120 `rev//min` in a plane normal to horizontal component of earth's magnetic field. Earth's magnetic field at the phase is 0.4 G and angle of dip `60^(@)`. Calculate the emf induced between the axle and rim of the wheel. How is the emf affected if number of spokes is increased ?