How will you expain the deflection or non-deflection of the galvanometer pointer as observed in the activity principles of electromagnetic induction?
- The pointer turns when a current in a shifting magnetic field is terminated in a closed circuit conductor. When there is relative motion between a magnetic field source and a conductor, a changing magnetic field is formed. This variation in the strength of the magnetic field in the coil area occurs when the magnet is oriented towards or away from the coil.
- The absence of a change of magnetic field passing through the closed circuit conductor or the absence of motion of the field relative to the conductor results of non-deflection of the galvanometer pointer. On the other hand, the mere presence of a resting magnetic field relative to a closed circuit conductor does not cause a current either.
- And moving the magnet in or out of the coil during the operation caused the pointer to move at either motion. The galvanometer's needle slowly returned to the zero point, and remained undeflected while the magnet connected to the coil was at rest.
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