1
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A thermally insulated vessel contains an ideal gas of molecular mass M and ratio of specific heats 1.4. Vessel is moving with speed v and is suddenly brought to rest. Assuming no heat is lost to the surrounding and vessel temperature of the gas increases by :

(R = universal gas constant)

A
$${{M{v^2}} \over {7R}}$$
B
$${{M{v^2}} \over {5R}}$$
C
2$${{M{v^2}} \over {7R}}$$
D
7$${{M{v^2}} \over {5R}}$$
2
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Two capacitors having capacitance C1 and C2 respectively are connected as shown in figure. Initially, capacitor C1 is charged to a potential difference V volt by a battery. The battery is then removed and the charged capacitor C1 is now connected to uncharged capacitor C2 by closing the switch S. The amount of charge on the capacitor C2, after equilibrium, is :

JEE Main 2022 (Online) 26th June Morning Shift Physics - Capacitor Question 49 English

A
$${{{C_1}{C_2}} \over {({C_1} + {C_2})}}V$$
B
$${{({C_1} + {C_2})} \over {{C_1}{C_2}}}V$$
C
$$({C_1} + {C_2})V$$
D
$$({C_1} - {C_2})V$$
3
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below two statements : One is labelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Non-polar materials do not have any permanent dipole moment.

Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.

In the light of above statements, choose the most appropriate answer from the options given below.

A
Both (A) and (R) are correct and (R) is the correct explanation of (A).
B
Both (A) and (R) are correct and (R) is not the correct explanation of (A).
C
(A) is correct but (R) is not correct.
D
(A) is not correct but (R) is correct.
4
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The magnetic flux through a coil perpendicular to its plane is varying according to the relation $$\phi = (5{t^3} + 4{t^2} + 2t - 5)$$ Weber. If the resistance of the coil is 5 ohm, then the induced current through the coil at t = 2 s will be,

A
15.6 A
B
16.6 A
C
17.6 A
D
18.6 A
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