ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

Top Scorers Of ECAT Physics Chapter 8 Waves MCQ`s Test

Sr.#	Question	Answer
1	SI unit of frequency is	A. second B. hertz C. revolution D. vibrations/sec
2	If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get	A. diffraction B. beat C. interference D. resonance
3	A simple pendulum consists of a	A. small light bob B. small heavy bob C. big light bob D. big heavy bob
4	Two sources of sound are said to be coherent if	A. The produce sounds of equal intensity B. They produce sounds of equal frequency C. They produce sound waves vibrating with the same phase D. They produce sound waves with zero or constant phase difference all instant of time
5	When the bob of simple pendulum is at mean position, its K.E will be	A. maximum B. minimum C. zero D. all of them
6	Through which character we can distinguish the light waves from sound waves	A. Interference B. Refraction C. Polarization D. Reflection
7	Example of progressive wave is	A. transverse waves B. longitudinal waves C. both of them D. none of them
8	Shock absorber of the car is an example of	A. resonance B. forced oscillations C. interference D. damped oscillations
9	When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:	A. Longitudinal waves B. Transverse waves C. Water waves D. Complex waves
10	When sound waves travel from air to water which of these remains constant?	A. Velocity B. Frequency C. Wavelength D. All the above