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

A coil is wound on a core of rectangular crosssection. If all the linear dimensions of the core are increased by a factor 2 and number of turns per unit length of coil remains same, the self inductance increases by a factor of (Assume, permeability is same)

A
16
B
8
C
4
D
2
2
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A graph of magnetic flux $(\phi)$ versus current (I) is shown for 4 different inductors $\mathrm{P}, \mathrm{Q}, \mathrm{R}, \mathrm{S}$. Minimum value of inductance is for inductor

MHT CET 2024 16th May Morning Shift Physics - Electromagnetic Induction Question 25 English

A
P
B
Q
C
R
D
S
3
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
4
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
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