1

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

+1

-0

A transformer of $$100 \%$$ efficiency has 200 turns in the primary and 40000 turns in the secondary. It is connected to a $$220 \mathrm{~V}$$ main supply and secondary feeds to a $$100 \mathrm{~K} \Omega$$ resistance. The potential difference per turn is

2

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

+1

-0

The current in a coil changes steadily from $$3 \mathrm{~A}$$ to $$5 \mathrm{~A}$$ in $$0.2 \mathrm{~s}$$ when an emf of $$2 \mu \mathrm{V}$$ is induced in it. The self-inductance of the coil is

3

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

+1

-0

The magnetic flux linked with a coil is given by the equation: $$\phi=8 t^2+t+10$$. The e.m.f. induced in the coil in the $$3^{\text {rd }}$$ second will be

4

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

+1

-0

Select the unit of the coefficient of mutual induction from the following.

Questions Asked from Electromagnetic Induction (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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