1
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A circular coil of resistance $R$, area $A$, number of turns ' $N$ ' is rotated about its vertical diameter with angular speed ' $\omega$ ' in a uniform magnetic field of magnitude ' $B$ '. The average power dissipated in a complete cycle is

A
$\frac{\mathrm{N}^2 \mathrm{~A}^2 \mathrm{~B}^2 \omega^2}{2 \mathrm{R}}$
B
$\frac{\mathrm{BNA} \omega}{\mathrm{R}}$
C
$\frac{\mathrm{N}^2 \mathrm{AB}}{2 \mathrm{R} \omega^2}$
D
$\frac{B A \omega}{2 N R}$
2
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two coils are kept near each other. When no current passess through first coil and current in the $2^{\text {nd }}$ coil increases at the rate $10 \mathrm{~A} / \mathrm{s}$, the e.m.f. in the $1^{\mathbb{P}}$ coil is 20 mV . When no current passes through $2^{\text {nd }}$ coil and 3.6 A current passes through $1^2$ coil the flux linkage in coil 2 is

A
$1.2 \times 10^{-3} \mathrm{~Wb}$
B
$1.8 \times 10^{-3} \mathrm{~Wb}$
C
$3.6 \times 10^{-3} \mathrm{~Wb}$
D
$7.2 \times 10^{-3} \mathrm{~Wb}$
3
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A rod of length ' $l$ ' is rotated with angular velocity ' $\omega$ ' about its one end, perpendicular to a magnetic field of induction ' $B$ '. The e.m.f. induced in the rod is

A
$\mathrm{B} l^2 \omega$
B
$0.5 \mathrm{~B} l^2 \omega$
C
$B / \omega$
D
$0.5 \mathrm{~B} / \omega$
4
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In an a. c. generator, when the plane of the coil is perpendicular to the magnetic field

A
magnetic flux is zero and induced e.m.f. is maximum.
B
magnetic flux is maximum and induced e.m.f. is zero.
C
both magnetic flux and induced e.m.f. are maximum.
D
both magnetic flux and induced e.m.f. are zero.
MHT CET Subjects
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