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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

`2.3 xx 10^(-4) V`

B

`3.1 xx 10^(-4) V`

C

`2.9 xx 10^(-4) V`

D

`1.61 xx 10^(-4) V`

Text Solution

Verified by Experts

The correct Answer is:
D
`1.61 xx 10^(-4) V`
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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 ?

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 bicycle wheel of radius 0.5 m has 32 spokes. It is rotating at the rate of 120 revolutions per minute, perpendicular to the horizontal component of earth's magnetic field B_(H) = 4 xx 10^(–5) tesla. The emf induced between the rim and the centre of the wheel will be-

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