MHT CET 2024 4th May Morning Shift | Electromagnetic Induction Question 30 | 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

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

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

$B / \omega$

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

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