Chapter 6: Electromagnetic Induction
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Frequency of AC depends on
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Commutator is used in
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Slip rings are used in
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AC generator converts
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AC generator works on
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Magnetic braking uses
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Eddy currents are used in
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Laminated cores reduce
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Eddy currents cause
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Eddy currents are
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Energy stored =
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Inductor stores energy in
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Induced emf due to self inductance is
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Mutual inductance occurs between
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Self inductance opposes
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Inductance depends on
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Self inductance unit
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emf increases with
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Motional emf formula
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Motional emf occurs due to
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Lenz’s law sign is
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Flux increases when
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emf depends on number of turns
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emf is maximum when
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Magnetic flux unit is
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Induced emf exists only when
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Direction of induced current is such that it
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Lenz’s law prevents
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Faster change in flux gives
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Induced emf depends on
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If flux is constant, emf is
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When flux increases, induced current
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emf =
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Faraday’s second law gives
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Faraday’s first law deals with
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Induced current direction is given by
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Flux formula is
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Number of turns increases emf
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Flux is scalar quantity
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Changing magnetic field produces
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Unit of induced emf is
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Flux is zero when angle =
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Magnetic flux is maximum when angle =
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Induced current opposes
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Lenz’s law is based on
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Negative sign in Faraday’s law represents
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Faraday’s law states emf is proportional to
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Magnetic flux depends on
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SI unit of magnetic flux is
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Electromagnetic induction is the phenomenon of
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