1
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Two very long, straight, and insulated wires are kept at 90° angle from each other in xy-plane as shown in the figure. These wires carry currents of equal magnitude I, whose directions are shown in the figure. The net magnetic field at point P will be : JEE Main 2019 (Online) 8th April Evening Slot Physics - Magnetic Effect of Current Question 125 English
A
$${{ + {\mu _0}I} \over {\pi d}}\left( {\mathop z\limits^ \wedge } \right)$$
B
$$ - {{{\mu _0}I} \over {2\pi d}}\left( {\mathop x\limits^ \wedge + \mathop y\limits^ \wedge } \right)$$
C
Zero
D
$$ {{{\mu _0}I} \over {2\pi d}}\left( {\mathop x\limits^ \wedge + \mathop y\limits^ \wedge } \right)$$
2
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
In the circuit shown, a four-wire potentiometer is made of a 400 cm long wire, which extends between A and B. The resistance per unit length of the potentiometer wire is r = 0.01 $$\Omega $$/cm. If an ideal voltmeter is connected as shown with jockey J at 50 cm from end A, the expected reading of the voltmeter will be :- JEE Main 2019 (Online) 8th April Evening Slot Physics - Current Electricity Question 213 English
A
0.25 V
B
0.20 V
C
0.50V
D
0.75 V
3
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A particle starts from origin O from rest and moves with a uniform acceleration along the positive x-axis. Identify all figures that correctly represent the motion qualitatively. (a = acceleration, v = velocity, x = displacement, t = time) JEE Main 2019 (Online) 8th April Evening Slot Physics - Motion Question 132 English 1 JEE Main 2019 (Online) 8th April Evening Slot Physics - Motion Question 132 English 2 JEE Main 2019 (Online) 8th April Evening Slot Physics - Motion Question 132 English 3 JEE Main 2019 (Online) 8th April Evening Slot Physics - Motion Question 132 English 4
A
(B), (C)
B
(A)
C
(A), (B), (C)
D
(A), (B), (D)
4
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An electric dipole is formed by two equal and opposite charges q with separation d. The charges have same mass m. It is kept in a uniform electric field E. If it is slightly rotated from its equilibrium orientation, then its angular frequency $$\omega$$ is :-
A
$$\sqrt {{{qE} \over {md}}} $$
B
$$\sqrt {{{qE} \over {2md}}} $$
C
$$\sqrt {{{qE} \over {-2md}}} $$
D
$$\sqrt {{{2qE} \over {md}}} $$
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