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A rectangular coil `20 cm xx 10 cm` having 500 turns rotates in a magnetic field of `5 xx 10^(-3) T` with a frequency of `1200 rev min^(-1)` about an axis perpendicular to the field.A. The maximum value of the induced emf `2pi//5` volt.B. The instantaneous emf when the plane of the coil is perpendicular to the field is zeroC. The instantaneous emf when the plane of the coil makes an angle of `60^(@)` with the field is `pi//5` volt.D. The instantaneous emf when the plane of the coil makes an angle of `30^(@)` with the field is `pi//10` volt |
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Answer» Correct Answer - A::B::C `E=NAB omega cos theta`, where `theta` is the angle between plane of coil and magnitude field, Substituting values option (a), (b) and (c) are correct. |
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