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JEE Main 2021 (Online) 25th February Morning Shift
Numerical
+4
-1
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A coil of inductance 2 H having negligible resistance is connected to a source of supply whose voltage is given by V = 3t volt. (where t is in second). If the voltage is applied when t = 0, then the energy stored in the coil after 4 s is _______J.
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2
JEE Main 2020 (Online) 6th September Morning Slot
Numerical
+4
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A part of a complete circuit is shown in the figure. At some instant, the value of current I is 1A and it is decreasing at a rate
of 102 A s–1. The value of the potential difference VP – VQ , (in volts) at that instant, is _________.

JEE Main 2020 (Online) 6th September Morning Slot Physics - Electromagnetic Induction Question 72 English
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3
JEE Main 2020 (Online) 5th September Morning Slot
Numerical
+4
-0
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Two concentric circular coils, C1 and C2 are
placed in the XY plane. C1 has 500 turns, and
a radius of 1 cm. C2 has 200 turns and radius
of 20 cm. C2 carries a time dependent current
I(t) = (5t2 – 2t + 3) A where t is in s. The emf
induced in C1 (in mV), at the instant t = 1 s is
$${4 \over x}$$. The value of x is ___ .
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4
JEE Main 2020 (Online) 2nd September Morning Slot
Numerical
+4
-0
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A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0 $$ \times $$ 10–5 T with its plane perpendicular to the field initially. It is rotated at constant angular speed about an axis along the diameter of coil and perpendicular to magnetic field so that it undergoes half of rotation in 0.2 s. The maximum value of EMF induced (in $$\mu $$V) in the coil will be close to the integer _______.
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