# Changes

,  15:20, 25 August 2014
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#Activity 5 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 5|Explanation of Michel Faraday experiment]]

#Activity 5 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 5|Explanation of Michel Faraday experiment]]
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==Concept #2 FLEMINGS RIGHT HAND RULE AND WORKING OF DYNAMO ==
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==Concept #2 Fleming right hand rule==

===Learning objectives===

===Learning objectives===

#State Fleming's Right hand rule of dynamo

#State Fleming's Right hand rule of dynamo

#Know the main parts of dynamo

#Know the main parts of dynamo

#Explain the working of AC dynamo

#Explain the working of AC dynamo
#Distriguish between AC dynamo and DC dyname
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#Distinguish between AC dynamo and DC dynamo

#Application of dynamo

#Application of dynamo
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(d) When the north pole of the magnet recedes form the end of the solenoid, the direction of induced current in the solenoid is such that the end of the solenoid towards the magnet becomes a south pole so as to attract the north pole of the magnet and thus opposes the cause producing it. The current induced current in solenoid at its end clockwise.

(d) When the north pole of the magnet recedes form the end of the solenoid, the direction of induced current in the solenoid is such that the end of the solenoid towards the magnet becomes a south pole so as to attract the north pole of the magnet and thus opposes the cause producing it. The current induced current in solenoid at its end clockwise.

Lenz’s law is wider significance as it implies the law of conservation of energy. It shows that the mechanical energy spent in doing work, against the opposing force experienced by the moving magnet, is transformed into the electrical energy due to which current flows in the solenoid.

Lenz’s law is wider significance as it implies the law of conservation of energy. It shows that the mechanical energy spent in doing work, against the opposing force experienced by the moving magnet, is transformed into the electrical energy due to which current flows in the solenoid.
'''A.C. Generator:''' An A.C.generator is a device which converts the mechanical energy into the electrical energy using the principle of electroimagnetic induction.
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'''A.C. Generator:''' An A.C.generator is a device which converts the mechanical energy into the electrical energy using the principle of electromagnetic induction.

Frequency of alternating current

Frequency of alternating current

In one complete rotation of the coil, we get one cycle of alternating emf in the external circuit. Thus the alternating emf has the frequency equal to the frequency of rotations of the coil.

In one complete rotation of the coil, we get one cycle of alternating emf in the external circuit. Thus the alternating emf has the frequency equal to the frequency of rotations of the coil.
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E=e0sin2nt

E=e0sin2nt

And the current is expressed as i=i0sin2nt

And the current is expressed as i=i0sin2nt
Where e0 and i0 represent the maximum values of emf and current respectiviely. Such a current is called an alternating current.
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Where e0 and i0 represent the maximum values of emf and current respectivily. Such a current is called an alternating current.

===Activities===

===Activities===