1
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The torque of a force $$5 \hat{i}+3 \hat{j}-7 \hat{k}$$ about the origin is $$\tau$$. If the force acts on a particle whose position vector is $$2 i+2 j+k$$, then the value of $$\tau$$ will be

A
$$11 \hat{i}+19 \hat{j}-4 \hat{k}$$
B
$$-11 \hat{i}+9 \hat{j}-16 \hat{k}$$
C
$$-17 \hat{i}+19 \hat{j}-4 \hat{k}$$
D
$$17 \hat{i}+9 \hat{j}+16 \hat{k}$$
2
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A thermodynamic system is taken from an original state D to an intermediate state E by the linear process shown in the figure. Its volume is then reduced to the original volume from E to F by an isobaric process. The total work done by the gas from D to E to F will be

JEE Main 2022 (Online) 29th July Evening Shift Physics - Heat and Thermodynamics Question 99 English

A
$$-$$450 J
B
450 J
C
900 J
D
1350 J
3
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The root mean square speed of smoke particles of mass $$5 \times 10^{-17} \mathrm{~kg}$$ in their Brownian motion in air at NTP is approximately. [Given $$\mathrm{k}=1.38 \times 10^{-23} \mathrm{JK}^{-1}$$]

A
$$60 \mathrm{~mm} \mathrm{~s}^{-1}$$
B
$$12 \mathrm{~mm} \mathrm{~s}^{-1}$$
C
$$15 \mathrm{~mm} \mathrm{~s}^{-1}$$
D
$$36 \mathrm{~mm} \mathrm{~s}^{-1}$$
4
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Light enters from air into a given medium at an angle of $$45^{\circ}$$ with interface of the air-medium surface. After refraction, the light ray is deviated through an angle of $$15^{\circ}$$ from its original direction. The refractive index of the medium is:

A
1.732
B
1.333
C
1.414
D
2.732
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