TNPSC Physics - Waves
Exam Duration: 45 Mins Total Questions : 30
Match List I (Frequency Range) with List II (Uses) and select the correct answer
List I | List II |
A.54 MHz to 890 MHz |
1.Television waves |
B.1710 MHz to 54 MHz |
2.Short wave |
C.88 MHz to 108 MHz |
3.FM radio |
D.300 MHz to 3000 MHz |
4.UHF band |
- (a)
A B C D 1 2 3 4 - (b)
A B C D 4 3 2 1 - (c)
A B C D 3 4 2 1 - (d)
A B C D 2 1 3 4
When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in
- (a)
pitch and loudness
- (b)
quality only
- (c)
pitch, loudness, and quality
- (d)
loudness only
Ultrasonic waves are produced by
- (a)
Peltier's effect
- (b)
Piezoelectric effect
- (c)
Doppler's effect
- (d)
Coulomb's law
The ratio of the speed of X-yays to that of gamma rays is
- (a)
<1
- (b)
>1
- (c)
1
- (d)
depends upon the ratio of their frequencies
Electromagnetic waves are produced by
- (a)
chargeless particle
- (b)
a static charge
- (c)
a moving charge
- (d)
an acceleration charge
Which one of the following has highest frequency?
- (a)
Cosmic rays
- (b)
X-rays
- (c)
radiowaves
- (d)
microwaves
Consider the following parts of spectra
1.visible
2.Infrared
3.Ultraviolet
4.Microwave
Which one of the following is the correct sequence in which their wavelength increase?
- (a)
4-3-1-2
- (b)
4-1-2-3
- (c)
3-2-1-4
- (d)
3-1-2-4
The patient is asked to drink barium sulfate (BaSo4) for examining the stomach by X-rays because X-rays are
- (a)
less absorbed by heavy atoms
- (b)
more absorbed by heavy atoms
- (c)
reflected by heavy atoms
- (d)
refracted by heavy atoms
Transverse waves can propagate
- (a)
in gas but not in a metal
- (b)
both in a gas and in a metal
- (c)
not in a gas but in a metal
- (d)
neither in a gas nor in a metal
Which one of the following is the correct sequence of wavelengths of radiations?
- (a)
UV > Green > IR > Hard > X-rays
- (b)
IR > Green > UV > Hard X-rays
- (c)
UV > Hard X-rays > IR > Green
- (d)
IR > Hard > X-rays > Green > UV
polarization of an electromagnetic wave is caused by
- (a)
refraction
- (b)
reflection
- (c)
transverse nature of electromagnetic wave
- (d)
longitudinal nature of electromagnetic wave
why is a sound heard with more Intensity through CO2 than through the air?
- (a)
Density of CO2 is more than that of air
- (b)
Density of CO2 is less than that of air
- (c)
Air is a bad conductor of heat
- (d)
CO2 is a compound but air is a mixture of gases
Some common medium in which speed of sound waves is measured is mentioned below.
1.Air
2.steel
3.Copper
4.Water
what is the correct increasing order of the speed of sound?
- (a)
1 < 4 < 2 < 3
- (b)
4 < 1 < 2 < 3
- (c)
1 < 4 < 3 < 2
- (d)
4 < 1 < 3 < 2
Speed of electromagnetic wave is the same
- (a)
for all frequencies
- (b)
for all wavelengths
- (c)
in all media
- (d)
for all intensities
Consider the following statements
1.Microwave ovens are used for cooking purposes.
2.Microwave are used in a Radar system for aircraft navigation.
3.A Radar using microwave can help in detecting the seed of tennis ball, cricket ball, automobile while in motion.
Which one of the following statements is correct?
- (a)
2 and 3
- (b)
1 and 2
- (c)
1 and 3
- (d)
1,2 and 3
Match List-I (Electromagnetic Wave) with List-II (Discoverer) and select the correct answer using the codes given below
List I | List II |
A.Infrared Waves | 1.Ritter |
B.Ultraviolet rays | 2.Newton |
C.rays | 3.Herschel |
D.Visible rays | 4.W.Roentgen |
- (a)
A B C D 1 2 3 4 - (b)
A B C D 3 1 4 2 - (c)
A B C D 4 3 2 1 - (d)
A B C D 3 2 1 4
An echo will be heard if the minimum distance between the source of sound and obstacle is
- (a)
10 m
- (b)
1 m
- (c)
15 m
- (d)
17 m
Which of the following types of the wave is used by computed tomography employed for visualization of the internal structure of human body?
- (a)
X-rays
- (b)
Sound waves
- (c)
Magnetic resonance
- (d)
Radioisotopes
The Doppler's effect is applicable for
- (a)
Light wave
- (b)
space wave
- (c)
sound wave
- (d)
All of these
When a wave goes from one level to another, there is a change in the
1.frequency
2.velocity
3.amplitude
4.wavelength
choose the correct answer.
- (a)
1,2 and 3
- (b)
2,3 and 4
- (c)
2 and 3
- (d)
1,2,3 and 4
The velocity of sound is generally greater in solids than in gases because
- (a)
the density of solids is low and the elasticity is high
- (b)
the elasticity of solids is very high
- (c)
the density of solids is high and the elasticity is low
- (d)
Both the density and elasticity of solids are very low
Match List-I (Types of Electromagnetic radiation) with List-II (Corresponding Frequency) and select the correct answer using the codes given below
List I | List II |
A.radio waves | 1.1016 - 1014 Hz |
B.Ultraviolet waves | 2.1010 - 108 Hz |
C.visible light | 3.10-6 - 10-3 Hz |
D.X-rays | 4.1014 - 1012 Hz |
5.1018 - 1016 Hz |
- (a)
A B C D 2 1 4 5 - (b)
A B C D 1 2 3 4 - (c)
A B C D 5 4 3 2 - (d)
A B C D 1 2 4 3
if v1, v2, and v3 are the velocities of sound in steel, water, and vacuum respectively, which one of the following relations is correct?
- (a)
v1 = v2 = v3
- (b)
v1 < v2 < v3
- (c)
v1 v2 v3 = 0
- (d)
v1 < v2 + v3
the wave used for a communication through artificial satellite are
- (a)
radio waves in the FM band
- (b)
radio waves in the AM band
- (c)
microwaves
- (d)
None of the above
Consider the following statements
1.In sound waves, the vibrations are perpendicular to the direction in which the wave travels.
2.Sound waves are elastic waves.
Which one of the following statements is correct?
- (a)
Only 2
- (b)
Only 1
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Speed of sound in a gas is proportional to
- (a)
the square root of adiabatic elasticity
- (b)
isothermal elasticity
- (c)
the square root of isothermal elasticity
- (d)
adiabatic elasticity
Sound waves in air are waves.
- (a)
radio
- (b)
transverse
- (c)
longitudinal
- (d)
electromagnetic
The waves moving from a sitar to a listener in air are
- (a)
transverse stationary
- (b)
transverse progressive
- (c)
longitudinal progressive
- (d)
longitudinal stationary
A progressive wave or travelling wave
- (a)
is that traveling in the + x-direction
- (b)
is that traveling in either (+)ve x-direction or (-)ve x-direction
- (c)
p is that traveling perpendicular to the x-axis
- (d)
None of the above
the velocity of the wave in a string (thread) is
- (a)
directly proportional to its mass per unit length
- (b)
inversely proportional to its mass per unit length
- (c)
proportional to square root of mass per unit length
- (d)
None of the above