Mechanics and Mathematical Methods ( Part 2 ) - TRB Physics Study Materials

SI NO.	QUESTIONS		ANSWERS
26	A sphere drawn around a particular molecule as centre and molecular range as radius is?		Sphere of influence
27	The potential energy per unit area of the surface film is called?		Surface energy
28	When a liquid has concave meniscus the angle of contact is?		Acute
29.	The free surface of a liquid is plane, surface tension acts?		Horizontally
30.	Excess pressure is more in?		Concave side
31.	The free surface of mercury in the beaker is the example of?		Capillary fall
32.	The rise of a liquid in a capillary tube is known as?		Capillary
33.	For a floating body to be in stable equilibrium the meta centre must be always above the?		Centre of gravity
34.	The distribution of velocity in a moving fluid is an example for ?		Vector field
35.	Gradient of scalar quantity is  a?		Vector
36.	The line integral is a?		Scalar
37.	The another name for  volume integral is?		Space integral
38.	Inertial frame obey’s?		Newton’s law
39.	The length of a moving body along the direction of motion through the medium is contracted this is?		Lorentz Fitzgerald contraction
40.	The moving clock appears to go slow, this is ?		Time dilation
41.		Mass of electron increase with?	Acceleration
42.		Example for Einstein’s mass energy relation is?	Nuclear fission
43.		The length of the satellite is 1.2 m speed of the satellite is 0.998 C, what is the contracted length?	0.2387m
44.		The force of attraction between molecules of water is?	Cohesive force
45.		The line integral of conservative field a around closed is ?	Zero
46.		Hooke’s law essentially defines yeas?	Elastic limit
47.		Velocity of sound in a gas is proportional to?	Square root of adiabatic elasticity
48.		Which of the following has the least elasticity?	Rubber
49.		The dependence of refractive index on the wavelength of light in a medium is explained by?	Dispersion
50.		The force exerted between tow billiard balls during their collision is?	Elastic force