Download ELECTRIC MOTOR

ELECTRIC MOTOR: It is a device which converts electrical energy to mechanical energy.
Principle: Electric motor is based on magnetic effect of electric current. Whenever a current carrying
conductor is placed in a magnetic field it will experience a force, the direction of force is given by
Fleming’s left hand rule.
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A galvanometer is an instrument which is used to detect the presence of electric current.
Electromagnetic Induction
A change in magnetic field associated with a conductor will induce a electric current in the conductor.
This phenomenon is known as electromagnetic induction.
The direction of induced current can be found using Fleming’s right-hand rule.
Stretch the thumb, forefinger and middle finger of right hand so that they are perpendicular to each
other ,if the forefinger indicates the direction of magnetic field and the thumb shows the direction of
motion of conductor, then the middle finger will show the direction of induced current.This rule is called
Fleming’s right-hand rule.
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Explain different ways to induce current in a coil.
We can induce current in a coil either by moving it in a magnetic field or by changing the
magnetic field around it.