Compare statically induced emf with dynamically induced emf on any four points.
Particulars
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Statically induced emf
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Dynamically induced emf
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Movement of coil or magnet
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Neither coil nor magnet moves
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Either coil moves or magnet moves.
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Current through coil of electromagnet
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Must vary with respect to time
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Can remain constant.
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Expression for induced voltage
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e = - L(di/dt) or -N(dФ/dt)
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e = Blv sinϴ
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Applications
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Transformer
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DC generators, Back emf in DC motors, Induction motors.
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Types
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i) Self-induced emf ii) Mutual-induced emf
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No sub-types
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Statically induced emf
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Dynamically induced emf
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Emf is induced without any relative motion between conductor and magnetic field.
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Emf is induced due to relative motion between conductor and magnetic field.
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Emf is induced when changing magnetic field links with a conductor.
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Emf is induced when conductor cuts the magnetic field due to relative motion between them.
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Direction of statically induced emf is given by Lenz’s law.
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Direction of dynamically induced emf is given by Fleming’s Right hand rule.
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Two types: Self-induced emf Mutually induced emf
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No such further classification
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e.g. emf induced in transformer windings
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e.g emf induced in Generator, Alternator armature windings
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