1
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements :

Statement I : In a diatomic molecule, the rotational energy at a given temperature obeys Maxwell's distribution.

Statement II : In a diatomic molecule, the rotational energy at a given temperature equals the translational kinetic energy for each molecule.

In the light of the above statements, choose the correct answer from the options given below :
A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
2
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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)
3
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A charge 'q' is placed at one corner of a cube as shown in figure. The flux of electrostatic field $$\overrightarrow E $$ through the shaded area is :

JEE Main 2021 (Online) 25th February Evening Shift Physics - Electrostatics Question 119 English
A
$${q \over {24{\varepsilon _0}}}$$
B
$${q \over {48{\varepsilon _0}}}$$
C
$${q \over {4{\varepsilon _0}}}$$
D
$${q \over {8{\varepsilon _0}}}$$
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Thermodynamic process is shown below on a P-V diagram for one mole of an ideal gas. If V2 = 2V1 then the ratio of temperature T2/T1 is :

JEE Main 2021 (Online) 25th February Evening Shift Physics - Heat and Thermodynamics Question 216 English
A
$$\sqrt 2 $$
B
$${1 \over {\sqrt 2 }}$$
C
$${1 \over 2}$$
D
2
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