Physics || Quiz || Set 3
1. Speed of sound in a medium depends upon the:
1) Elasticity
2) Amplitude
3) Density
4) Both A & B
2. At what temperature, the velocity of sound will be double its value at 273 K?
1) 2 x 273 K
2) 4 x 273 K
3) 8 x 273 K
4) 16 x 273 K
3. For constructive interference the phase difference can be:
1) π
2) 3 π
3) 5 π
4) 0
4. Laplace's correction proves that propagation of sound through the air is:
1) Isochoric process
2) Adiabaticprocess
3) Isobaric process
4) Isothermal process
5. Two interfering waves of the same frequency have an intensity ratio 16:1. The ratio of Intensities at the maxima and the minima is:
1) 25/16
2) 4
3) 9
4) 25/9
6. Starting with the same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways. The work done by the gas is W1 if the process is purely isothermal, W2 if purely isobaric, and W3 if purely adiabatic. Then
1) W1 > W2 > W3
2) W2 > W3 > W1
3) W2 > W1 > W3
4) W1 > W3 > W2
7. An closed system is one in which:
1) Mass does not cross boundaries of the system, though energy may do so
2) Neither mass nor energy crosses the boundaries of the system
3) Both mass nor energy crosses the boundaries of the system
4) Mass crosses the boundary but not the energy
8. An isolated system is one in which:
1) Mass does not cross boundaries of the system, though energy may do so
2) Neither mass nor energy crosses the boundaries of the system
3) Both mass nor energy crosses the boundaries of the system
4) Mass crosses the boundary but not the energy
9. Which of the following is not the intensive property?
1) Pressure
2) Density
3) Temperature
4) Heat
10. When the temperature difference between the source and the sink increases, the efficiency of the heat engine will:
1) Increase
2) Decrease
3) Is not affected
4) May increase or decrease depending upon the nature of the working substance