Electromagetic effects

Is there a battery source? What is that “piece of thing” that the person is holding? Why is there a current?

Electromagnetic Effects Phenomenon of inducing an emf in a circuit due to a changing magnetic field.

Faraday’s experiments ,[object Object]

Faraday’s experiments ,[object Object],- Set up the apparatus as shown in the diagram. - A permanent magnet is inserted into a solenoid connected to a sensitive galvanometer. - The galvanometer needle deflects as the permanent magnet move within the solenoid. - This shows that e.m.f. can be induced when there is a changing magnetic field.

Factors affecting the magnitude of the induced emf Greater deflection Insert N pole of 1 bar magnet into solenoid with twice the number of turns Greater deflection Insert N pole of 2 bar magnets into solenoid Greater deflection Insert N pole of 1 bar magnet into solenoid at twice the speed Slight deflection Insert N pole of 1 bar magnet into solenoid Galvanometer response Procedure

Factors affecting the magnitude of the induced emf ,[object Object],[object Object],[object Object]

Determine the direction of the induced current ,[object Object],[object Object]

Deflection to the left Solenoid move towards N pole of magnet Deflection to the right Solenoid withdraw from the same magnet Deflection to the left Withdraw the same bar magnet out of solenoid Deflection to the right Insert S pole of 1 bar magnet into solenoid Deflection to the right Withdraw the same bar magnet out of solenoid Deflection to the left Insert N pole of 1 bar magnet into solenoid Galvanometer response Procedure

Thinking corner 1 ,[object Object],No induced current produced. Why? There’s no change in magnetic field.

Thinking corner 2 ,[object Object],[object Object],[object Object]

Electromagetic effects

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Electromagetic effects