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Thermodynamics — JEE Main Physics MCQs with Solutions
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Sample questions with solutions
Q1 — medium · theory
A small ball of mass ������ and density ������ is 24-4. The excess pressure inside a soap bubble is
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q2 — medium · theory
23-6.
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q3 — medium · theory
radius 2.0 × 10–5 m and density 1.2 × 103 T 2T
A. 3.8 × 10–11 N (2) 3.9 × 10–10 N with methylene iodide (surface tension = 0.05 ✓ Correct
B. 1.8 × 10–10 N (4) 5.8 × 10–10 N Nm–1, density = 667 kg m–3) which rises to
C. 2 × 10-9 m (2) 5 × 10-8 m (3) 0.137 m (4) 0.172 m
D. 4 × 10-8 m (4) 5 × 10-10m
Q4 — medium · theory
(4) 24-2. (3) ANSWER KEY 24-4. (4) 24-5. (4)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q5 — medium · theory
(1) 23-5. (2) 24-9. 600 24-10. 3
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q6 — medium · numerical
mg − F − F = ma F
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q7 — medium · numerical
= 8 × 942 × 10–7 = 7536 × 10–7 J 2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q8 — medium · theory
T.2r 2 r3g 4 r3dg
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q9 — medium · theory
dropped in a viscous liquid of density ������ . After 24-5.
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q10 — medium · theory
22-1. Under isothermal condition, the pressure of a
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q11 — medium · theory
In Millikan's oil drop experiment, what is 3T T
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q12 — medium · theory
(3) 24-12. 40 21-2. (2) 23-7. 1150 22-3. 2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q13 — medium · theory
Y E/A F YA v 3 Pdv dP.v 3P
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q14 — medium · numerical
Angle of contact = 30° 1
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q15 — medium · theory
sometime, the ball falls with constant velocity. 24-6. thrice the excess pressure inside a second
A. (3) 1:81 (4) 1:27 ✓ Correct
B. mg 1 0 (4) 0 one end. If its other end is pulled by a force F,
C. 2296 m (2) 2249 m density has terminal velocity 'v'. Another ball
D. 2518 m (4) 2396 m of the same mass but of radius 2r, falling
Q16 — medium · theory
22-2.
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q17 — medium · theory
(1) 21-1. (4) 24-8. (4) 21-3. (4) 21-4. (1)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q18 — medium · numerical
a = 0 for constant velocity 24-5. Y stress Y r2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q19 — medium · theory
2f Y
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q20 — medium · numerical
droplets of water. The surface energy will 21-1. gas is given by P = aV–3, where a is a
A. 100 times (2) 10 times bulk modulus at constant temperature is ✓ Correct
B. 1 th (4) 1 th equal to [JEE Main_130423_{S1}]
C. P
D. 0.72 × 10–4 J (2) 5.76 × 10–4 J
Q21 — medium · theory
viscous force acting on an uncharged drop of (1) r (2d )g (2) r (d )g
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q22 — medium · theory
(1) 24-3. (3) 23-6. (2) 22-1. (1)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q23 — medium · theory
48 22-6. 100
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q24 — medium · numerical
mg − F = F 24-6.
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q25 — medium · numerical
Y = 4 × 1010 N/m2 4 4
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q26 — medium · numerical
Using Pascals law H = 40 cm
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q27 — medium · theory
(2) 22-5. 50 20-2. (2) 22-7. 2 21-6. 4
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q28 — medium · theory
B dP Ui 75 105 N 4(1 102 )2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q29 — medium · theory
R 2gh (12 h) 2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q30 — medium · theory
A uniform heating wire of resistance 36 is ELASTICITY AND VISCOSITY & SURFACE TENSION
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D