Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A circular coil of radius '$$R$$' has '$$N$$' turns of a wire. The coefficient of self induction of the coil will be ( $$\mu_0=$$ permeability of free space)

A
$$\frac{\mu_0 N \pi R^2}{2}$$
B
$$\frac{\mu_0 N \pi R}{4}$$
C
$$\frac{\mu_0 N^2 \pi R}{2}$$
D
$$\frac{\mu_0 N \pi R}{2}$$
2
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A wire of length 1 m is moving at a speed of 2 m/s perpendicular homogenous magnetic field of 0.5 T. The ends of the wire are joined to resistance 6$$\Omega$$. The rate at which work is being done to keep the wire moving at that speed is

A
$$\frac{1}{3}$$ W
B
$$\frac{1}{6}$$ W
C
$$\frac{1}{12}$$ W
D
1 W
3
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic potential energy stored in a certain inductor is $$25 \mathrm{~mJ}$$, when the current in the inductor is $$50 \mathrm{~mA}$$. This inductor is of inductance

A
2.00 H
B
0.20 H
C
200 H
D
20 H
4
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A wire of length '$$L$$'; having resistance '$$R$$' falls from a height '$$\ell$$' in earth's horizontal magnetic field '$$B$$'. The current through the wire is ( $$\mathrm{g}=$$ acceleration due to gravity)

A
$$\frac{\mathrm{BL} \sqrt{2 \mathrm{~g} \ell}}{\mathrm{R}}$$
B
$$\frac{\mathrm{BL} \sqrt{2 \mathrm{~g} \ell}}{\mathrm{R}^2}$$
C
$$\frac{2 \mathrm{BLg} \ell}{\mathrm{R}^2}$$
D
$$\frac{\mathrm{B}^2 \mathrm{~L}^2}{\mathrm{R}}$$
Questions Asked from MCQ (Single Correct Answer)
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