Mechanics and Mathematical Methods - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	Earthquake is the disadvantage of?	Resonance
2.	Which of the following is the necessary condition for SHM?	Displacement and acceleration are proportional
3.	When a particle is acted upon simultaneously by two SHM at right angles to each other. The resultant path is called?	Lissajou’s figures
4.	A waxing and a subsequent waning constitute?	One beat
5.	The velocity of sound is higher in?	Steel
6.	Velocity of sound varies directly as the?	Square root of absolute temperature
7.	If the wind is blowing in the opposite direction of wave it will?	Decrease the sound velocity
8.	Sudden burst of a cycle tube is an example of?	Adiabatic process
9.	The frequency less the 20HZ is called?	Infra sonics
10.	In piezo-electric effect, the cross-section of the crystal is?	Hexagonal
11.	The total momentum after impact along the common normal should be equal to the total momentum before impact along same direction, this is?	Principle of conservation of momentum
12.	If the body is in impinge directly when the direction of motion of each is?	Along common normal
13.	The sphere and the plane are smooth there is?	No force
14.	Bodies which do not exhibit the property of elasticity are called?	Plastic
15.	Stress is equal to ?	Restoring force by area
16.	The limit beyond which permanent deformation occurs is called the ?	Elastic limit
17.	The ratio of longitudinal stress to longitudinal strain is?	Young’s modulus
18.	Change in the volume to original volume is known as?	Bulk strain
19.	Searle’s method is used to find the?	Young’s modulus
20.	Glass is more elastic than?	Rubber
21	When temperature increases viscosity?	Decreases
22	Reynold’s number for streamline flow is?	0 and 2000
23	The velocity to liquid up to which the flow is streamlined and above which is turbulent is called as?	Critical velocity
24	The constant acquired by a body while falling through a viscous liquid is?	Terminal velocity
25	The force of attraction between the molecules of same substance is called?	Neutral force