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Electromagnetic induction

Electromagnetic induction
Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

400 N
1000 N
100 N
300 N

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Electromagnetic induction
For a purely inductive circuit which of the following is true?

Apparent power is zero
Relative power is zero
Actual power of the circuit is zero
Any capacitance even if present in the circuit will not be charged

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Electromagnetic induction
A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

350 mH
None of the listed here
3500 mH
250 mH

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Electromagnetic induction
A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly

90 N
60 N
30 N
120 N

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Electromagnetic induction
The coefficient of coupling between two air core coils depends on

Mutual inductance between two coils only
Mutual inductance and self inductance of two coils
Self-inductance of two coils only
None of the listed here

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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

30 mH
36 mH
38 mH
48 mH

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