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प्रश्न
Why must work be done to move a magnet towards or away from a coil when an induced current flows?
पर्याय
The magnetic flux remains constant during motion.
The induced current always assists the magnet’s motion.
The coil has infinite resistance.
The induced current opposes the magnet’s motion.
MCQ
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उत्तर
In either direction of motion, the induced current opposes the motion causing it. External work must therefore be done to keep moving the magnet.
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