Q4 of 37 Page 102

Describe the experiment that explains the phenomenon of an electromagnetic induction and give its conclusion.

The experiment was first done by Michael Faraday. He observed that the current will only induce in the coil if the magnetic field around the coil changes.

In the experiment, he first made a loop of conducting wire and connect a galvanometer with it to record the observation. Then he performed the following things and recorded observation in each case:


He move a magnet towards the coil or move away from it.


He made an observation also when both are stationary.


Then he moved the Coil toward the magnet or move away from it.


Then he move both of them towards each other.


induction.jpg


Result of the experiment: From the observation he concluded that whenever the magnetic field around a conductor wire changes it produces current in the wire. His first, second and third observation resulted in a deflection produced in the galvanometer because as the coil or magnet moves the magnetic field changes. But in the second observation both of them were steady which results in no induction current.


Conclusion of the experiment: He finally concluded that whenever magnetic field around a conductor wire changes, results in induction of the current.


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