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प्रश्न
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.
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उत्तर
End A turns into an S-pole and End B into an N-pole. A pair of limbs wind in the opposite direction.
संबंधित प्रश्न
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