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Electromagnetic induction

Electromagnetic induction
Increasing the field or increasing the current will decrease the force on the conductor.

Yes
No

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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

60 N
90 N
120 N
30 N

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Electromagnetic induction
A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?

None of the listed here
0.2 s
0.5 s
0.1 s

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Electromagnetic induction
Reversing the field or the current will reverse the force on the conductor.

Yes
No

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Electromagnetic induction
If current in a conductor increases then according to Lenz's law self-induced voltage will

Aid the increasing current
Produce current opposite to the increasing current
Aid the applied voltage
Tend to decrease the amount of current

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Electromagnetic induction
The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will

28 mH
24 mH
3 mH
12 mH

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