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Quiz 56
Mdcat-past-papers Quiz
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1101. In moist air (humidity), the speed of sound waves:
Increases
Decreases
Remain same
Zero
1102. The temperature of air is increased 1°C then increase in speed of sound is:
6.1 ms⁻¹
1.6 ms⁻¹
0.61 ms⁻¹
0.16ms⁻¹
1103. The speed of sound in a medium containing ideal gas is NOT dependent on?
Density
Pressure
Moisture
Temperature
1104. The speed of sound in air is 332m/s. The speed of sound at 22°C will be:
345.2m/s
340 m/s
350 m/s
330 m/s
1105. Speed of sound does not depend upon:
Density
Temperature
Pressure
Depend on all
1106. In ripple tank 40 waves pass through a certain point in one second. If the wavelength of the waves is 5cm, then find the speed of wave
2.7m/s
3m/s
2m/s
2m/s
1107. The speed of sound is 332ms⁻¹ at 0°C. The speed at 10°C will be
338.1ms⁻¹
333.3ms⁻¹
334.2ms⁻¹
336.4ms⁻¹
1108. Loudness of sound is directly related to:
Intensity of sound
Frequency of sound
Wavelength of sound
Pitch of sound
1109. The increase in speed of sound in air for each degree rise above 0°C is:
0.4m/s
0.51m/s
0.81m/s
0.61m/s
1110. The speed of sound in air does not depend on:
Density of medium
Pressure
Temperature
Moisture
1111. A metallic wire of length 2m hooked between two points has tension 10N. If mass per unit length is 0.004kg/m, then fundamental frequency emitted by wire on vibration is:
48Hz
24Hz
12.5 Hz
6.25 Hz
1112. Which one of the following is INCORRECT about the nodes when the string is plucked:
Amplitude of vibration is zero
Do not move along the string
Produced at the fixed ends of strings
Distance between consecutive nodes is 1 wavelength
1113. Which one of the following does not cause stationary waves?
Two waves of equal frequency
Two waves of same speed
Two waves of unequal amplitude
Two waves travelling in opposite directions
1114. Two transverse travelling waves are presented by these equations. y₁ = A₀sin(Kx−ωt) and y₂ = A₀sin(kx−ωt−Ø). These two waves differ in:
Amplitude
Frequency
Wavelength
Phase
1115. Longitudinal waves exhibit:
Polarization
Particle nature
Property of energy transmission
Phenomena of superposition of waves
1116. If the fundamental frequency of vibration of a string fixed at both ends is 50Hz, the fourth harmonic will be:
200Hz
150Hz
12.5Hz
250Hz
1117. In standing waves, the distance between two consecutive nodes or anti-nodes is:
2λ
λ/2
λ/4
λ
1118. Effective distance for echo is:
10m
20m
15m
17m
1119. There are 2 pianos playing the same note. One has a frequency of 223.20Hz and the other 223.50Hz. The beat frequency between them will be:
0.30Hz
-0.30Hz
0Hz
223.35Hz
1120. What happens when two waves of the same frequency and amplitude meet in phase?
They cancel out—destructive interference
They form a wave of double
Amplitude—constructive interference
They produce a wave with zero amplitude
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