1
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The mutual inductance of two coils is 45 mH . The self-inductance of the coils are $\mathrm{L}_1=75 \mathrm{mH}$ and $\mathrm{L}_2=48 \mathrm{mH}$. The coefficient of coupling between the two coils is

A
0.3
B
0.4
C
0.75
D
1.0
2
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A coil of resistance $250 \Omega$ is placed in a magnetic field. If the magnetic flux $(\phi)$ linked with the coil varies with time $t(\mathrm{~s})$ as $\phi=50 \mathrm{t}^2+7$. The current in the coil at $t=4 \mathrm{~s}$ is

A
1.3 A
B
$\quad 1.4 \mathrm{~A}$
C
$\quad 1.5 \mathrm{~A}$
D
1.6 A
3
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A metal disc of radius R rotates with an angular velocity $\omega$ about an axis perpendicular to its plane passing through its centre in a magnetic field of induction B acting perpendicular to the plane of the disc. The induced e.m.f. between the rim and axis of the disc is

A
$\mathrm{B} \pi \mathrm{R}^2$
B
$\frac{2 \mathrm{~B} \pi^2 \mathrm{R}^2}{\omega}$
C
$\mathrm{B} \pi \mathrm{R}^2 \omega$
D
$\frac{\mathrm{BR}^2 \omega}{2}$
4
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
0.1 H
B
1 mH
C
1 H
D
10 mH
MHT CET Subjects
EXAM MAP