MHT CET 2024 9th May Evening Shift | Electromagnetic Induction Question 20 | Physics

Two coils of self-inductance 25 mH and 9 mH are placed close together such that the effective flux in one coil is completely linked with the other The mutual inductance between these coils is

34 mH

16 mH

15 mH

6 mH

MHT CET 2024 9th May Evening Shift

MCQ (Single Correct Answer)

-0

Consider the following circuit. By keeping $\mathrm{S}_1$ closed, the capacitor is fully charged and then $S_1$ is opened and $S_2$ is closed, then

MHT CET 2024 9th May Evening Shift Physics - Electromagnetic Induction Question 18 English

At time $\mathrm{t}=0$, the energy stored in the circuit is purely in the form of magnetic energy.

At $\mathrm{t}>0$, there is no exchange of energy between $L$ and $C$.

At any time $\mathrm{t}>0$, the current in the circuit is in the same direction.

At any time $\mathrm{t}>0$, the instantaneous current in the circuit may be $\mathrm{V} \sqrt{\frac{\mathrm{c}}{\mathrm{L}}}$

MHT CET 2024 9th May Evening Shift

MCQ (Single Correct Answer)

-0

A square loop ABCD is moving with constant velocity ' $\vec{v}$ ' in a uniform magnetic field ' $\vec{B}$ ' which is perpendicular to the plane of paper and directed outward. The resistance of coil is ' $R$ ', then the rate of production of heat energy in the loop is [ L - length of side of loop]

$\frac{B^2 L^2 V}{R}$

$\frac{B^2 L^2 V^2}{R}$

$\frac{B^2 L V^2}{R}$

$\frac{\mathrm{BLV}^2}{\mathrm{R}}$

MHT CET 2024 9th May Morning Shift

MCQ (Single Correct Answer)

-0

A metal rod of length ' $l$ ' rotates about one of its ends in a plane perpendicular to a magnetic field of induction ' $B$ '. If the e.m.f. induced between the ends of the rod is ' $e$ ', then the number of revolutions made by the rod per second is

$\frac{\mathrm{e}}{\mathrm{B} \pi^2 l}$

$\frac{\mathrm{e}}{\mathrm{B} \pi l^2}$

$\frac{\mathrm{B}^2}{\mathrm{e} \pi l}$

$\frac{\pi l^2}{\mathrm{eB}}$

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