21
Stationary wave is formed by
A)
a transverse wave superposing a longitudinal wave
B)
two waves of the same speed superposing
C)
two waves of same frequency travelling in the same direction
D)
two waves of same frequency travelling in the opposite direction
Answer & Solution
Answer: Option
D
22
Sound is one of the following-
A)
Tidal wave
B)
Mechanical wave
C)
Surface wave
D)
Electromagnetic wave
Answer & Solution
Answer: Option
B
A)
watt
B)
REM
C)
centigrade
D)
decibel
Answer & Solution
Answer: Option
D
24
The visible portion of the electromagnetic spectrum is
A)
infrared
B)
radio wave
C)
microwave
D)
light
Answer & Solution
Answer: Option
D
25
The amplitude of the sound wave depends on-
A)
Temperature of object
B)
Material of object
C)
Quality of material
D)
Force required to vibrate an object
Answer & Solution
Answer: Option
D
26
Put in ascending order the speed of sound in the mediums.
A)
3, 2, 1
B)
3, 1, 2
C)
1, 3, 2
D)
2, 1, 3
Answer & Solution
Answer: Option
B
27
Quality of a musical note depends on
A)
fundamental frequency
B)
amplitude of the wave
C)
harmonics present
D)
velocity of sound in the medium
Answer & Solution
Answer: Option
B
28
Resonance is an example of
A)
tuning fork
B)
forced vibration
C)
free vibration
D)
damped oscillation
Answer & Solution
Answer: Option
B
29
When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to
A)
reflection
B)
refraction
C)
forced vibrations
D)
damped vibrations
Answer & Solution
Answer: Option
C
30
Which technique is used to determine the depth of the ocean, explore underwater hills, valleys, submarines, icebergs etc.?
A)
absorbent sound
B)
sound absorption
C)
SONAR
D)
MRI
Answer & Solution
Answer: Option
C
