Thermal Physics and Acoustics (Part 2) - TRB Physics Study Materials

SI NO.	QUESTIONS		ANSWERS
26	The temperature of photosphere is about?		1000K
27	Newton’s law of cooling explains?		Rate of loss of heat
28	When a liquid boils there is an increase in?		Entropy
29	The thermodynamic process in which the temperature of the system remains constant?		Adiabatic
30.	The intensity of sound will be depends on?		Amplitude
31.	A point source in an isotropic medium gives rise to a wave which travels equally in all direction is?		Spherical wave
32.	Any motion that repeats itself after regular interval of time is known as?		Periodic motion
33.	In SHM when the particle is at mean position at that time the acceleration is?		Zero
34.	Which is the initial phase of vibrating particle?		Epoch
35.	The phase of the vibrating particle changes with?		Time
36.	The total energy of an oscillating particle is equal to is?		Potential energy and Kinetic energy
37.	Water equivalent is equal to?		Thermal capacity
38.	As atomicity of gas increases?		Cp and Cv same
39.	The force exerted by a bat on a cricket ball is?		Impulsive force
40.	The speediest mode of heat transfer is?		Radiation
41.		Which of the following is a scalar quantity?	Volume, Time and Mass
42.		The centre of gravity of a triangular body lies at its?	Centroid
43.		Which of the following examples of lever belong to the third order?	Forceceps
44.		The acceleration of body moving in a circular path at uniform speed is?	Directed towards the centre
45.		Which of the following quantities has no unit?	Strain
46.		When a particle at rest is acted upon by two equal forces at right angle to each other the path of the particle will be?	A straight line
47.		The practical unit of work is called?	A joule
48.		A unit force is that which produces?	A unit acceleration in a unit mass
49.		Energy possessed by a body due to its position is known as?	Potential energy
50.		What is the horse power of the engine that can pump 550 lbs of water per second form a well 50ft. deep to the surface?	50