Two circular coils A and B are placed to each other. If the current in the coil A is changed, will some current be induced in the coil B? give reason
Answers
As the coil B is situated near coil A, it also experiences the magnetic field. As the current in coil A changes, the magnetic field associated with it also changes. Hence, the magnetic field around coil B also changes. Due to change in magnetic field around the coil B, a current is induced in coil B.
AnSwer :-
If the current in coil A is switched on or switched off, then an electric current is induced in the bcoil B (see figure given here). This can be explained as follows :-
(i) When we switch on current in coil A, it becomes an electromagnet and produces a magnetic field around coil B. The effect is just the same as pushing a magnet into coil B. So, an induced current flows in coil B for a moment. When the current in coil A becomes steady, its magnetic field also becomes steady and the current in coil B stops.
(ii) When we switch off the current in coil A, then its magnetic field in coil B stops quickly. This effect is just the same as pulling a magnet quickly out of coil B. So, in this case an induced current flows in coil B in the opposite direction.
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