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A wheel with 15 metallic spokes each 60 ...

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 ?

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AI Generated Solution

To solve the problem, we will use the formula for the induced electromotive force (e.m.f.) in a rotating wheel in a magnetic field. The induced e.m.f. (E) can be calculated using the formula: \[ E = \frac{1}{2} B v L \sin(\theta) \] Where: - \( E \) is the induced e.m.f. - \( B \) is the magnetic field strength (horizontal component of the Earth's magnetic field). - \( v \) is the linear velocity of the spokes. ...
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