what is electro-magnetic induction.Expalin the Experimental
observations of Electro-magnetic induction is based on a series of
experiments carried out by Faraday and Henery.
Answers
Answer:
Electromagnetic induction is the production of an electromotive force across a conductor when it is exposed to a varying magnetic field. Experiment: Two different coils of copper wire having large number of turns (say 50 and 100 turns respectively) are taken.
Answer:
Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field
Explanation:
In this experiment, Faraday connected a coil to a galvanometer, as shown in the figure above. A bar magnet was pushed towards the coil, such that the north pole is pointing towards the coil. As the bar magnet is shifted, the pointer in the galvanometer gets deflected, thus indicating the presence of current in the coil under consideration. It is observed that when the bar magnet is stationary, the pointer shows no deflection and the motion lasts only till the magnet is in motion. Here, the direction of the deflection of the pointer depends upon the direction of motion of the bar magnet. Also, when the south pole of the bar magnet is moved towards or away from the coil, the deflections in the galvanometer are opposite to that observed with the north-pole for similar movements. Apart from this, the deflection of the pointer is larger or smaller depending upon the speed with which it is pulled towards or away from the coil. The same effect is observed when instead of the bar magnet, the coil is moved and the magnet is held stationary. This shows that only the relative motion between the magnet and the coil are responsible for the generation of current in the coil.
