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Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give reason.
Given:
Two circular coils A and B are placed close to each other.
Action:
The current in coil A is changed.
To find:
It is to be observed whether current is induced in coil B when the current flow in coil A or not.
Observation:
When two circular coils A and B are placed close to each other. If the current in coil A is changed then the magnetic field of coil A will also get changed. So, magnetic field lines associated with coil B will also get changed, so an induced current will be set up in coil B due to emf$(electromotive\ force)$. On observing it is found that the needle of the galvanometer shows some deflection. This deflection indicates that a current is induced in coil B also when the current in the coil is changed if both coils A and B are placed close to each other.
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