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  4. In a transformer, the number of turns in the primary coil is 140 and that in the secondary coil is 280 . If the current in the primary coil is 4 text A , then that in the secondary coil is

Q. In a transformer, the number of turns in the primary coil is and that in the secondary coil is . If the current in the primary coil is , then that in the secondary coil is

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