if the current in the coil A is changed, will some current be induced in the coil B ?explain.
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Yes, current will be induced in the coil B. This happens because when current changes in A, the magnetic field produced by the current also changes. When the changing magnetic field is experienced by B it induces a current to oppose the field.
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whenever their is change in magnetic flux the current is induced in secondary this phenomenon is electro magnetic induction
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