(A) Decrease
(B) Remains constant
(C) Increase
(D) Decrease first and then increase
Category: Physics Mcqs
Physics Mcqs for NTS, PPSC, FPSC, CSS, PMS, Educators, SPSC, Lecturer, BPSC, AJKPSC, PTS, PST, EST, SST and all other exams. Users will find mcqs related to mechanics, Thermodynamics, Photonics, study of heat, Distance, work, force, time, machines, study of electricity, magnetism, law of motion, nuclear physics, Quantum, relativity, solar system, and all the topics will be covered in the physics mcqs section.
At constant pressure, the graph between V (volume) and T (absolute temp.) is:
(A) Hyperbola
(B) Parabola
(C) Straight line
(D) Ellipse
One Calorie is equal to:
(A) 4.18 erg
(B) 4.18 J
(C) 41.8 J
(D) 4.35 J
The efficiency of diesel engine roughly ranges from:
(A) 25% to 35%
(B) 35% to 40%
(C) 45% to 65%
(D) 65% to 85%
The ratio 𝐂𝐩/𝐂𝒗 = γ for a diatomic gas like air is:
(A) 1.67
(B) 1.40
(C) 1.30
(D) 1.29
First law of thermodynamics when applied to an adiabatic process becomes:
(A) W = ΔU
(B) W = – ΔU
(C) Q = ΔU
(D) Q = W
Efficiency of Carnot engine becomes 100% if:
(A) temperature of the source and the sink are equal
(B) temperature of the source is 0 K (absolute zero)
(C) temperature of the sink is 0 K (absolute zero)
(D) none of these
A bicycle pump works in accordance with:
(A) Newton’s first law of motion
(B) first law of thermodynamics
(C) Pascal’s law
(D) Stoke’s law