A wheel with 8 metallic spokes each 50 cm long is rotated with a speed of 120 rev. `"min"^(-1
Channel: Doubtnut
Date: 09/05/2020

A wheel with 8 metallic spokes each 50 cm long is rotated with a speed of 120 rev. `"min"^(-1)` in a plane normal to the horizontal component of the Earth's magnetic field. The Earth's magnetic field at the place in 0.4 G and the angle of dip is `60^(@)`. Calculate the emf induced between the axle and the rim of the wheel. How will the value of emf be affected if the number of spokes were increased.