1
BITSAT 2024
MCQ (Single Correct Answer)
+3
-1
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} $
2
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

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
3
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

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
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