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Electromagnetic induction

Electromagnetic induction
Lenz's law is a consequence of the law of conservation of

Induced current
Induced e.m.f.
Energy
Charge

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

Permeability of the core
The number of their turns
All of the listed here
Cross-sectional area of their common core

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Electromagnetic induction
The magnitude of the induced e.m.f. in a conductor depends on the

Flux density of the magnetic field
Rate of change of flux-linkages
Amount of flux linkages
Amount of flux cut

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Electromagnetic induction
Two 300 uH coils in series without mutual coupling have a total inductance of

900 uH
300 uH
600 uH
1200 uH

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Electromagnetic induction
The direction of induced e.m.f. can be found by

Kirchhoff s voltage law
Lenz's law
Laplace's law
Fleming's right hand rule

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Electromagnetic induction
The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is

6 mH
36 mH
12 mH
18 mH

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