iCON Education - Electromagnetic Induction BITSAT Test

Question 1: Palette 1/4

BITSAT 2025 MCQ

A current $I=10 \sin (100 \pi t) A$ is passed in the first coil, which induces a maximum emf of $5 \pi \mathrm{~V}$ in second coil. The mutual inductance between the coil is

A

5 mH

B

10 mH

C

15 mH

D

2.5 mH

Question 2: Palette 2/4

BITSAT 2024 MCQ

Inside a solenoid of radius 0.5 m , magnetic field is changing at a rate of $ 50 \times 10^{-6} \mathrm{~T} / \mathrm{s} $. Acceleration of an electron placed at a distance of 0.3 m from axis of solenoid will be

A

$ 23 \times 10^{6} \mathrm{~ms}^{-2} $

B

$ 26 \times 10^{6} \mathrm{~m} / \mathrm{s}^{2} $

C

$ 1.3 \times 10^{9} \mathrm{~ms}^{-2} $

D

$ 26 \times 10^{9} \mathrm{~m} / \mathrm{s}^{2} $

Question 3: Palette 3/4

BITSAT 2021 MCQ

Two coils A and B have a mutual inductance 0.001 H. The current changes in the first coil according to the equation $i = {i_0}\sin \omega t$, where i₀ = 10A and $\omega$ = 10$\pi$ rads^$-$1. The maximum value of emf in the second coil is

A

0.01 $\pi$ V

B

1 $\pi$ V

C

0.1 $\pi$ V

D

0.05 $\pi$ V

Question 4: Palette 4/4

BITSAT 2020 MCQ

Given that in a fluorescent lamp's choke, a reverse voltage of 120 V is generated as the choke's current changes steadily from 0.50 A to 0.20 A in a time frame of 0.030 ms. Calculate the self inductance of the choke in millihenrys (mH).

A

12 H

B

12 $\times$ 10^$-$3 mH

C

12 $\times$ 10^$-$3 H

D

0