Two separate but nearby coils are mounted along the same axis. A power supply controls the flow of current in the first coil, an d thus the magnetic field it produces. The second coil is connected only to an ammeter. The ammeter will indicate that a current is flowing in the second coil:.
1 answer:
The ammeter will indicate that a current is flowing in the second coil only when current changes in the first coil.
<h3>
Induced emf </h3>
An emf is induced in a coil placed in a magnetic field when a current carrying conductor moves in the field.
emf = NdФ/dt
where;
dФ is change in flux of the field N is number of turns dt is change in time
Thus, the ammeter will indicate that a current is flowing in the second coil only when current changes in the first coil.
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