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प्रश्न
What causes a continuously alternating EMF in an a.c. generator?
विकल्प
A stationary coil in a constant magnetic field
A constant magnetic flux through the coil
Removal of the external load
Rotation of the coil in a uniform magnetic field
MCQ
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उत्तर
Rotation of the coil continuously changes the flux linked with it. That continuing change induces a continuously alternating EMF.
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