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Question
The emf induced in a conductor rotating in bipolar field is
The emf induced in a conductor rotating in bipolar field is
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Solution
The correct option is B ac
It is nothing but the EMF in a conductor in a rotating magnetic field is sinusoidal and alternating. It may be observed from the process of EMF generation in a conductor. In the initial position, the conductor is parallel with magnetic flux lines. So, there is no EMF. When it reaches perpendicular to flux lines, EMF generation is maximum. After that again it reaches the parallel path to flux lines. So, EMF is zero now. This same action happens again, but it is in reverse direction. So, again there is an EMF but is in the negative direction. Hence, we get the sinusoidal waveform that has a bipolar field and that is nothing but the AC.
It is nothing but the EMF in a conductor in a rotating magnetic field is sinusoidal and alternating. It may be observed from the process of EMF generation in a conductor. In the initial position, the conductor is parallel with magnetic flux lines. So, there is no EMF. When it reaches perpendicular to flux lines, EMF generation is maximum. After that again it reaches the parallel path to flux lines. So, EMF is zero now. This same action happens again, but it is in reverse direction. So, again there is an EMF but is in the negative direction. Hence, we get the sinusoidal waveform that has a bipolar field and that is nothing but the AC.
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