Question

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Write and explain the experiment done by Faraday .

Class - 10th
Chapter - Magnetic Effects of electric current. ​

Answer 1

Answer:

Faraday's Magnetic Field Induction Experiment

When Michael Faraday made his discovery of electromagnetic induction in 1831, he hypothesized that a changing magnetic field is necessary to induce a current in a nearby circuit. To test his hypothesis he made a coil by wrapping a paper cylinder with wire.

Explanation:

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Answer 2

Faraday's experiment :-

★ Faraday connected the coil of a wire with a sensitive galvanometer.

Case 1: Bar magnet → North pole

★ When a bar magnet with it's North pole facing the coil was moved into the coil, the galvanometer showed deflection.

Case 2: Bar magnet → South pole

★ When the bar magnet with it's South pole facing the coil was moved into the coil, the galvanometer again showed deflection.

Case 3: Bar magnet → Away from the coil

★ When the bar magnet is moved away from the coil, galvanometer showed deflection but this time in the opposite direction.

Case 4: Bar magnet → stationary

★ When bar magnet was stationary near the coil, no deflection was observed in the galvanometer.

Conclusion:

• This phenomenon of producing induced current in a closed circuit of a coil due to change in magnetic field is known as Electro-Magnetic Induction.