MHT CET 2024 4th May Morning Shift | Electromagnetic Induction Question 69 | Physics

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

$\frac{\mathrm{N}^2 \mathrm{~A}^2 \mathrm{~B}^2 \omega^2}{2 \mathrm{R}}$

$\frac{\mathrm{BNA} \omega}{\mathrm{R}}$

$\frac{\mathrm{N}^2 \mathrm{AB}}{2 \mathrm{R} \omega^2}$

$\frac{B A \omega}{2 N R}$

MHT CET 2024 3rd May Evening Shift

MCQ (Single Correct Answer)

-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

$1.2 \times 10^{-3} \mathrm{~Wb}$

$1.8 \times 10^{-3} \mathrm{~Wb}$

$3.6 \times 10^{-3} \mathrm{~Wb}$

$7.2 \times 10^{-3} \mathrm{~Wb}$

MHT CET 2024 3rd May Evening Shift

MCQ (Single Correct Answer)

-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

$\mathrm{B} l^2 \omega$

$0.5 \mathrm{~B} l^2 \omega$

$B / \omega$

$0.5 \mathrm{~B} / \omega$

MHT CET 2024 3rd May Morning Shift

MCQ (Single Correct Answer)

-0

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

magnetic flux is zero and induced e.m.f. is maximum.

magnetic flux is maximum and induced e.m.f. is zero.

both magnetic flux and induced e.m.f. are maximum.

both magnetic flux and induced e.m.f. are zero.

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