1
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
Change Language
In the given figure the magnetic flux through the loop increases according to the relation $$\phi$$B(t) = 10t2 + 20t, where $$\phi$$B is in milliwebers and t is in seconds.

The magnitude of current through R = 2$$\Omega$$ resistor at t = 5 s is ___________ mA.

JEE Main 2021 (Online) 27th July Evening Shift Physics - Electromagnetic Induction Question 60 English
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2
JEE Main 2021 (Online) 25th July Morning Shift
Numerical
+4
-1
Change Language
A circular conducting coil of radius 1 m is being heated by the change of magnetic field $$\overrightarrow B $$ passing perpendicular to the plane in which the coil is laid. The resistance of the coil is 2 $$\mu$$$$\Omega$$. The magnetic field is slowly switched off such that its magnitude changes in time as

$$B = {4 \over \pi } \times {10^{ - 3}}T\left( {1 - {t \over {100}}} \right)$$

The energy dissipated by the coil before the magnetic field is switched off completely is E = ___________ mJ.
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3
JEE Main 2021 (Online) 25th February Morning Shift
Numerical
+4
-1
Change Language
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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4
JEE Main 2020 (Online) 6th September Morning Slot
Numerical
+4
-0
Change Language
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 69 English
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