Sound-mcqs Physics-day-8 Target ssc cgl 2017 tier 1
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Sound-mcqs Physics-day-8 Target ssc cgl 2017 tier 1
Sound-mcqs Physics-day-8 Target ssc cgl 2017 tier 1
Q1. Microphone is a device which transforms the
- sound signal into current signal
- current signal into sound signal
- sound signal into light signal
- light signal into sound signal
Ans:- a
Q2. The instrument which uses sound waves to measure the depth of oceans is
- Radar
- Sonar
- Altimeter
- Venturimeter
Ans:- b
Q3. The frequency of ultrasound wave is typically
- Above 20 kHz
- Above 20,000 kHz
- Below 20kHz
- Below 02 kHz
Ans:- c
Q4. When a vibrating tuning fork is placed on a table, a loud sound is heard. This is dire to :
- reflection
- refraction
- forced vibrations
- damped vibrations
Ans:- c
Q5. Speed of sound is the greatest in:
- Water
- Air
- Glass
- Glycerine
Ans:- c
Q6. Noise is measured in
- Watt
- REM
- Centigrade
- Decibel
Ans:- d
Q7. Voice of which of the following has minimum frequency?
- baby girl
- baby boy
- a man
- a woman
Ans:- c
Q8. The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
- Audible sounds
- Ultrasonics
- Infrasonics
- Megasonics
Ans:- a
Q9. The velocity of sound in air
- decreases with increase of temperature
- increases with decrease of temperature
- does not depend on temperature
- decreases with decrease of temperature
Ans:- a
Q10. Least audible sound for most of the human ear is:
- 10.0 μ bar
- 0.0002 μ bar
- 0.005 μ bar
- 5.0 μ bar
Ans:- b