Question

State Fleming's right hand rule and give examples. Demonstrate the same with the help of an experiment.

Answer 1

If a conductor is moved in a magnetic field perpendicular to the field, an induced current flows in the conductor. According to the Fleming's right hand rule, if we point the index finger, middle finger and the thumb perpendicularly with the thumb pointing in the direction of motion of conductor and the index finger along the magnetic field, then the middle finger points in the direction of induced current.

Take a length of wire, hook it up to an ammeter(something that measures current), and place it between the poles of a magnet. Now move the wire sharply through the invisible magnetic field the magnet produces and a current will briefly flow through the wire (registering on the meter). Next, move the wire in the opposite direction and observe the deflection. It will be observed that the deflection is opposite. Verify the direction of induced current in each case using the Fleming's right hand rule.