(A) remains constant
(B) becomes zero
(C) falls
(D) rises
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.
The SI unit of Mechanical equivalent heat is:
(A) joule-calories
(B) joules/calorie
(C) calorie-ergs
(D) ergs/calorie
A liquid boils at a temperature at which its saturated vapor pressure becomes:
(A) equal to the atmospheric pressure
(B) twice the atmospheric pressure
(C) half the atmospheric pressure
(D) none of these
During an adiabatic expansion the increase in volume is associated with:
(A) decrease in pressure & decrease in temperature
(B) increase in pressure & decrease in temperature
(C) increase in pressure & increase in temperature
(D) decrease in pressure & increase in temperature
A metal sheet with a circular hole is heated: The hole will:
(A) contract
(B) expand
(C) remain unaffected
(D) contract or expand depending on the value of the linear expansion coefficient
Two spheres of same size are made of the same material but one is hollow and the other is solid. They are heated to the same temperature. The:
(A) both the spheres will expand equally
(B) the hollow sphere will expand more than the solid one
(C) the solid sphere will expand more than the hollow one
(D) no conclusion can be drawn about their relative expansions unless the nature of the
material is known
Expansion during heating:
(A) occurs at the same rate for all materials
(B) occurs at different rates for different materials
(C) increase the weight of a material
(D) increase the density of material
The ratio of rise in temperature of a gas when compressed adiabatically to that when compressed isothermally to the same extent:
(A) Is less than 1
(B) Is more than 1
(C) depends on gas
(D) is equal to 1