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Electromagnetic induction

Electromagnetic induction
A coil with negligible resistance has 50V across it with 10 mA. The inductive reactance is

100 ohms
1000 ohms
500 ohms
5000 ohms

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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

36 mH
48 mH
30 mH
38 mH

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

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

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Electromagnetic induction
Which circuit element(s) will oppose the change in circuit current?

Inductance only
Inductance and capacitance
Capacitance only
Resistance only

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Electromagnetic induction
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

None of the listed here
Remains same
Decreases
Increases

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

Inductance
Resistance
Capacitance
All of the listed here

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MORE MCQ ON Electromagnetic induction

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