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1
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Find the truth table for the function Y of A and B represented in the following figure.

JEE Main 2021 (Online) 27th July Evening Shift Physics - Semiconductor Question 131 English
A
JEE Main 2021 (Online) 27th July Evening Shift Physics - Semiconductor Question 131 English Option 1
B
JEE Main 2021 (Online) 27th July Evening Shift Physics - Semiconductor Question 131 English Option 2
C
JEE Main 2021 (Online) 27th July Evening Shift Physics - Semiconductor Question 131 English Option 3
D
JEE Main 2021 (Online) 27th July Evening Shift Physics - Semiconductor Question 131 English Option 4
2
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Figure A and B shown to long straight wires of circular cross-section (a and b with a < b), carrying current I which is uniformly distributed across the cross-section. The magnitude of magnetic field B varies with radius r and can be represented as :

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetic Effect of Current Question 142 English
A
JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetic Effect of Current Question 142 English Option 1
B
JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetic Effect of Current Question 142 English Option 2
C
JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetic Effect of Current Question 142 English Option 3
D
JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetic Effect of Current Question 142 English Option 4
3
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Two identical particles of mass 1 kg each go round a circle of radius R, under the action of their mutual gravitational attraction. The angular speed of each particle is :
A
$$\sqrt {{G \over {2{R^3}}}} $$
B
$${1 \over 2}\sqrt {{G \over {{R^3}}}} $$
C
$${1 \over {2R}}\sqrt {{1 \over G}} $$
D
$${{2G} \over {{R^3}}}$$
4
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
What will be the magnitude of electric field at point O as shown in the figure? Each side of the figure is l and perpendicular to each other?

JEE Main 2021 (Online) 27th July Evening Shift Physics - Electrostatics Question 165 English
A
$${1 \over {4\pi {\varepsilon _0}}}{q \over {{l^2}}}$$
B
$${1 \over {4\pi {\varepsilon _0}}}{q \over {(2{l^2})}}\left( {2\sqrt 2 - 1} \right)$$
C
$${q \over {4\pi {\varepsilon _0}{{(2l)}^2}}}$$
D
$${1 \over {4\pi {\varepsilon _0}}}{{2q} \over {2{l^2}}}\left( {\sqrt 2 } \right)$$

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