Physics General Science Test Hard Mode

Sr. #	Questions	Answers Choice
1	For production of beats the two sources must have	Different frequencies and same amplitude Different frequencies Different frequencies same amplitude and same phase Different frequencies and same phase.
2	The temperature at which the speed of sound becomes double as was at 27°C is	273°C 0°C 927°C 1027°C
3	Two sources of sound are said to be coherent if	They produce sounds of equal intensity They produce sounds of equal frequency They produce sound waves vibrating with the same phase They produce sound waves with zero or constant phase difference all instant of time
4	When sound waves travel from air to water which of these remains constant?	Velocity Frequency Wavelength All the above
5	In a simple harmonic motion the kinetic energy (KE) and the potential energy (PE), are such that throughout the motion	KE remains constant PE remains constant KE/PE is constant KE + PE remains constant

News