A wheel with ten metallic spokes each `0.50 m` long is rotated with a speed of `120 rev//min` in a plane normal to the earth's magnetic field at the place. If the magnitude of the field is `0.4` gauss, the induced e.m.f. between the axle and the rim of the wheel is equal to

A wheel with 10 metallic spokes each 0.5 m long is rotated with a speed of 120 rpm, in a plane normal to earths magnetic field at the place. If the magnitude of the field is 0.40 gauss, what is the induced e.m.f. between the axle and rim of the wheel.

A wheel with 20 metallic spokes each of length 8.0 m long is rotated with a speed of 120 revolution per minute in a plane normal to the horizontal component of earth magnetic field H at a place. If H=0.4xx10^(-4) T at the place, then induced emf between the axle the rim of the wheel is

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 ?

A wheel with 20 metallic spokes each 1m long is rotated with a speed of 120 rpm in a plane perpendicular to magnetic field of 0.4G. The induced emf between axle and rim of wheel will be

(a) A metallic rod of length l is moved perpendicular to its length with velocity v in a magnetic field vec(B) acting perpendicular to the plane in which rod moves. Derive the expression for the inducced emf. (b) A wheel with 15 metallic spokes each 60 cm long, is rotated at 360 rev/min in a plane normal to the horizontal component of earth's magnetic field. The angle of dip at that place is 60^(@) . If the emf induced between rim of the wheel and the axle is 400 mV, calculate the horizontal component of earth's magnetic field at the place. How will the induced emf change, if the number of spokes is increased ?

A wheel with 15 metallic spokes each 60 cm long is roated at 360 rpm in a plane normal to the horizontal component of earth's magnetic field. The angle of dip at that place 60^(@) . If the e.m.f. induced between the rim of the wheel and the axle is 400 m mV, calculate horizontal component of earth's magnetic field at the place. How will the induced e.m.f. change. if number of spokes is increased ?