ELECTRICAL CIRCUITS
EEE
MALLA REDDY COLLEGE OF ENGINEERING AND TECHNOLOGY
Where, flux Φ in Wb = B*A
B = magnetic field strength
A = area of the coil
Lenz's law obeys Newton's third law of motion (i.e. to every action there is always an equal and
opposite reaction) and the conservation of energy (i.e. energy may neither be created nor
destroyed and therefore the sum of all the energies in the system is a constant).
Lenz's law
: It states that when an emf is generated by a change in magnetic flux according to
Faraday's Law, the polarity
of the induced emf is such, that it produces a current that's
magnetic field opposes the change which produces it.
The negative sign used in Faraday's law of electromagnetic induction, indicates that the induced
emf and the change in magnetic flux have opposite signs.
There exists a definite relation between the direction of the induced current, the
direction of the flux and the direction of motion of the conductor. The direction of the
induced current may be found easily by
applying either
Fleming's Right-hand Rule
There exists a definite relation between the direction of the induced current, the
direction of the flux and the direction of motion of the conductor. The direction of the
induced current may be found easily by applying either
Fleming's Left-hand Rule
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