MHT CET 2024 2nd May Evening Shift | Electromagnetic Induction Question 57 | Physics

An air cored coil has self inductance of 0.1 H . A soft iron core of relative permeability 1000 is introduced and the number of turns is reduced to $\left(\frac{1}{10}\right)^{\text {th }}$. The value of self inductance is now

0.1 H

1 mH

1 H

10 mH

MHT CET 2024 2nd May Evening Shift

MCQ (Single Correct Answer)

-0

The coil and magnet are moved in the same direction with same speed (V). The induced e.m.f. is

MHT CET 2024 2nd May Evening Shift Physics - Electromagnetic Induction Question 57 English

zero.

proportional to V.

proportional to $\mathrm{V}^{-1}$.

finite but does not depend on V.

MHT CET 2024 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

The magnetic energy stored in an inductor of inductance $5 \mu \mathrm{H}$ carrying a current of 2 A is

10 mJ

5 mJ

$10 \mu \mathrm{~J}$

$5 \mu \mathrm{~J}$

MHT CET 2024 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

A bicycle wheel of radius ' $R$ ' has ' $n$ ' spokes. It is rotating at the rate of ' $F$ ' r.p.m. perpendicular to the horizontal component of earth's magnetic field $\vec{B}$. The e.m.f. induced between the rim and the centre of the wheel is

$\frac{1}{2} \mathrm{~B} \pi \mathrm{FR}^2$

$\mathrm{B} \pi \mathrm{FR}^2$

$\frac{1}{\mathrm{n}} \mathrm{B} \pi \mathrm{FR}$

$B \pi \mathrm{FR}^2 n$

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