1

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MCQ (Single Correct Answer)

+4

-1

A uniform magnetic field B of 0.3 T is along the positive Z-direction. A rectangular loop (abcd) of sides 10 cm × 5 cm carries a current I of 12 A. Out of the following different orientations which one
corresponds to stable equilibrium ?

2

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

A small circular loop of wire of radius a is located at the centre of a much larger circular wire loop of radius b. The two loops are in the same plane. The outer loop of radius b carries an alternating current I = I

_{o}cos ($$\omega $$t). The emf induced in the smaller inner loop is nearly :3

JEE Main 2017 (Offline)

MCQ (Single Correct Answer)

+4

-1

In a coil of resistance 100 $$\Omega $$, a current is induced by changing
the magnetic flux through it as shown in the figure. The
magnitude of change in flux through the coil is:

4

JEE Main 2016 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

A conducting metal circular-wire-loop of radius r is placed perpendicular to a
magnetic field which varies with time as

B = B

B = B

_{0}e$${^{{{ - t} \over r}}}$$ , where B_{0}and $$\tau $$ are constants, at time t = 0. If the resistance of the loop is R then the heat generated in the loop after a long time (t $$ \to $$ $$\infty $$) is :Questions Asked from Electromagnetic Induction (MCQ (Single Correct Answer))

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