Mdcat-past-papers Quiz

1081. A tuning fork having frequency 440 Hz produces sound waves which travel with a speed of 340 m/s. What is the separation between compression and adjacent rarefaction?

0.57 m
0.67 m
0.77 m
0.87 m

1082. Example of longitudinal wave is:

Sound wave
Light wave
Electromagnetic wave
Water wave

1083. Which one requires no medium to propagate?

X-rays
Gamma rays
Beta rays
All need no medium

1084. Which of the following does not travel in vacuum?

Sound waves
Light waves
Transverse waves
All of above

1085. In a ripple tank, 200 waves pass through a certain point in one second. The wavelength of each wave is 0.02 m. What is the wave speed?

4 m/s
2 m/s
6 m/s
8 m/s

1086. Trough of a wave acts as:

Concave lens
Convex lens
Convex mirror
Plane mirror

1087. Crest of wave acts as:

Concave mirror
Convex mirror
Convex lens
Plane mirror

1088. The horizontal distance travelled by wave during one complete cycle is called:

Frequency
Wavelength
Amplitude
Time period

1089. In transverse wave, the portion above the mean level is called?

Wave front
Wave trough
Wave crest
Wave length

1090. The maximum displacement of particle of a medium, on either side of the mean position of a wave is called:

Wavelength
Amplitude
Frequency
Crest

1091. A normal person can hear sound waves ranging in frequency from 20Hz to 20kHz. The maximum wavelength is:

17m
17mm
17cm
17km

1092. A distant star is receding from the earth with a speed of 1.40 x 10⁷ m/s. It emits light of frequency 4.57 x 10¹⁴ Hz. The speed of light is 3 x 10⁸ m/s. The Doppler effect formula can be used with light waves. What will be the frequency of this light when detected on Earth?

2.04 x 10¹³ Hz
4.37 x 10¹⁴ Hz
4.57 x 10¹⁴ Hz
4.79 x 10¹⁴ Hz

1093. An object moving faster than the speed of sound. This object is called:

Sonic
Supersonic
Hypersonic
Ultrasonic

1094. The speed of sound at 0°C in air is 332m/s. What will be the speed of sound at 50°C?

300m/s
332m/s
362m/s
382m/s

1095. The increase in the speed of sound for each degree rise above 0°C is:

0.61 m/s
0.31 m/s
0.41 m/s
0.31 m/s

1096. Which of the following factor does not affect the speed of sound in air?

Pressure
Density
Temperature
Medium

1097. The speed of sound in air is 332m/s at 0°C. What will be its value at 10°C?

332ms⁻¹
338.1ms⁻¹
332.61ms⁻¹
334.1ms⁻¹

1098. Which of the following factors does not affect the speed of sound in air?

Density of gas
Moisture in air
Temperature
Pressure of gas

1099. Which of the following factors does not affect the speed of sound in air?

Density of gas
Moisture in air
Temperature
Pressure of gas

1100. Speed of sound is 332ms⁻¹ at 0°C. What will be its value at 10°C?

3320ms⁻¹
3381 ms⁻¹
332.2 ms⁻¹
332.1 ms⁻¹