1
JEE Advanced 2018 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
In the figure below, the switches $${S_1}$$ and $${S_2}$$ are closed simultaneously at $$t=0$$ and a current starts to flow in the circuit. Both the batteries have the same magnitude of the electromotive force (emf) and the polarities are as indicated in the figure. Ignore mutual inductance between the inductors. The current $$I$$ in the middle wire reaches its maximum magnitude $${I_{\max }}$$ at time $$t = \tau $$ . Which of the following statements is (are) true?

JEE Advanced 2018 Paper 1 Offline Physics - Electromagnetic Induction Question 17 English
A
$${I_{\max }} = {V \over {2R}}$$
B
$${I_{max}} = {V \over {4R}}$$
C
$$\tau = {L \over R}\ln 2$$
D
$$\tau = {{2L} \over R}\ln 2$$
2
JEE Advanced 2017 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
A circular insulated copper wire loop is twisted to form two loops of area $$A$$ and $$2A$$ as shown in the figure. At the point of crossing the wires remain electrically insulated from each other. The entire loop lies in the plane (of the paper). A uniform magnetic field $$\overrightarrow B $$ points into the plane of the paper. At $$t=0,$$ the loop starts rotating about the common diameter as axis with a constant angular velocity $$\omega $$ in the magnetic field.

Which of the following options is/are correct?

JEE Advanced 2017 Paper 1 Offline Physics - Electromagnetic Induction Question 16 English
A
The emf induced in the loop is proportional to the sum of the areas of the two loops
B
The amplitude of the maximum net emf induced due to both the loops is equal to the amplitude if maximum emf induced in the smaller loop alone
C
The net emf induced due to both the loops is proportional to $$\cos \,\omega t$$
D
The rate of change of the flux is maximum when the plane of the loops is perpendicular to plane of the paper
3
JEE Advanced 2016 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
A rigid wire loop of square shape having side of length L and resistance R is moving along the X-axis with a constant velocity v0 in the plane of the paper. At t = 0, the right edge of the loop enters a region of length 3L where there is a uniform magnetic field B0 into the plane of the paper, as shown in the figure. For sufficiently large v0, the loop eventually crosses the region. Let x be the location of the right edge of the loop. Let v(x), I(x) and F(x) represent the velocity of the loop, current in the loop, and force on the loop, respectively, as a function of x. Counter-clockwise current is taken as positive.

JEE Advanced 2016 Paper 2 Offline Physics - Electromagnetic Induction Question 11 English
Which of the following schematic plot(s) is (are) correct? (Ignore gravity)
A
JEE Advanced 2016 Paper 2 Offline Physics - Electromagnetic Induction Question 11 English Option 1
B
JEE Advanced 2016 Paper 2 Offline Physics - Electromagnetic Induction Question 11 English Option 2
C
JEE Advanced 2016 Paper 2 Offline Physics - Electromagnetic Induction Question 11 English Option 3
D
JEE Advanced 2016 Paper 2 Offline Physics - Electromagnetic Induction Question 11 English Option 4
4
JEE Advanced 2016 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
A conducting loop in the shape of a right angled isosceles triangle of height 10 cm is kept such that the 90$$^\circ$$ vertex is very close to an infinitely long conducting wire (see the figure). The wire is electrically insulated from the loop. The hypotenuse of the triangle is parallel to the wire. The current in the triangular loop is in counterclockwise direction and increased at a constant rate of 10 As$$-$$1. Which of the following statement(s) is (are) true?

JEE Advanced 2016 Paper 1 Offline Physics - Electromagnetic Induction Question 12 English
A
There is a repulsive force between the wire and the loop.
B
If the loop is rotated at a constant angular speed about the wire, an additional emf of $$\left( {{{{\mu _0}} \over \pi }} \right)$$ volt is induced in the wire
C
The magnitude of induced emf in the wire is $$\left( {{{{\mu _0}} \over \pi }} \right)$$ volt
D
The induced current in the wire is in opposite direction to the current along the hypotenuse.
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