1
JEE Main 2021 (Online) 25th February Evening Shift
+4
-1 Match List I with List II.

List I List II
(a) Rectifier (i) Used either for stepping up or stepping down the a.c. voltage
(b) Stabilizer (ii) Used to convert a.c. voltage into d.c. voltage
(c) Transformer (iii) Used to remove any ripple in the rectified output voltage
(d) Filter (iv) Used for constant output voltage even when the input voltage or load current change

Choose the correct answer from the options given below :
A
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
B
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
D
(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
2
JEE Main 2021 (Online) 24th February Evening Shift
+4
-1 Figure shows a circuit that contains four identical resistors with resistance R = 2.0$$\Omega$$, two identical inductors with inductance L = 2.0 mH and an ideal battery with emf E = 9V. The current 'i' just after the switch 'S' is closed will be : A
3.0 A
B
3.37 A
C
9 A
D
2.25 A
3
JEE Main 2020 (Online) 5th September Evening Slot
+4
-1
An infinitely long, straight wire carrying current I, one side opened rectangular loop and a conductor C with a sliding connector are located in the same plane, as shown, in the figure. The connector has length $$l$$ and resistance R. It slides to the right with a velocity v. The resistance of the conductor and the self inductance of the loop are negligible. The induced current in the loop, as a function of separation r, between the connector and the straight wire is : A
$${{{\mu _0}} \over {4\pi }}{{Ivl} \over {Rr}}$$
B
$${{{\mu _0}} \over {\pi }}{{Ivl} \over {Rr}}$$
C
$${{{\mu _0}} \over {2\pi }}{{Ivl} \over {Rr}}$$
D
$${{2{\mu _0}} \over \pi }{{Ivl} \over {Rr}}$$
4
JEE Main 2020 (Online) 4th September Morning Slot
+4
-1
A small bar magnet is moved through a coil at constant speed from one end to the other. Which of the following series of observations will be seen on the galvanometer G attached across the coil? Three positions shown describe :
(a) the magnet's entry
(b) magnet is completely inside and
(c) magnet's exit.
A B C D JEE Main Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
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