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Electromagnetic induction

Electromagnetic induction
A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

12 V
10 V
25 V
15 V

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

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

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Electromagnetic induction
Which of the following circuit elements will oppose the change in circuit current?

All of the listed here
Resistance
Inductance
Capacitance

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Electromagnetic induction
Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

38 mH
36 mH
48 mH
30 mH

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Electromagnetic induction
Higher the self-inductance of a coil,

Lesser its weber-turns
Lower the e.m.f. induced
Greater the flux produced by it
Longer the delay in establishing steady current through it

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

600 uH
1200 uH
900 uH
300 uH

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