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PPSC Physics Full Book MCQs With Answers
Question # 1
A Carnot engine has the same efficiency between (i) 100 K and 500 K and ii) T and 900 K What will be T.
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90 K
100 K
180 K
200 K
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Question # 2
Who was awarded Nobel Prize for fist artificial atomic transmutation.
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Yukawa
Rutherford
Chadwick
Becquerel
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Question # 3
Birds planes and boats are streamlined to reduce
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Turbulence
Thrust
Drag
Lift
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Question # 4
Which of the following propagates at the same speed as velocity of light.
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Heat waves
Sound waves
Shock waves
Beta particles
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Question # 5
The horizontal distance of a projectile from the point of launch to the point of impacts is called.
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Height of projectile
Range of projectile
Path of projectile
Angle of projectile
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Question # 6
Image formed by a camera is
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Real, inverted, and diminished
Virtual, upright and diminished
Virtual, upright and magnified
Real, inverted and magnified
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Question # 7
If the specific latent heat of vaporization of oxygen is 214 kJ kg-1 how much heat will be absorbed when 3.0 kg of oxygen is boiled off at its boiling point.
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14 kJ
64 k J
140 kJ
642 k j
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Question # 8
Who discovered a phenomenon of thermos electricity.
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Peltier
Joule
Seeback
thomson
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Question # 9
The unit of energy are the same as that of
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Force
Power
Work
Efficiency
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Question # 10
If the number of coulombs per second through a wire of 10 Ohm resistance across a 120 V line is 12, the current is
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5 A
10 A
12 A
15 A
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Question # 11
The Compton effect in X-rays proves that
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Electrons have wave property
x-rays have wave properly
X-rays have particle characteristics
Electrons cannot exist
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Question # 12
What is the number of degree of freedom of an oscillating simple gravity pendulum
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1
2
3
4
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Question # 13
Geiger counter was designed by
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Wilson
Geiger and Muller
Lawrence
Mosely
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Question # 14
One particle having zero mass and zero charge is.
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Positron
Electron
Neutrino
Neutron
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Question # 15
On which parameter the path difference between two interfering waves depends upon.
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Amplitude
Pitch
Intensity
Phase angle
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Question # 16
An object moves 5.0 m north and then 3.0 m south . Find both the distance travelled and the magnitude of the displacement vector.
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2.0 m, 8.0 m
8.0 m, 2.0 m
8.0 m, 8.0 m
2.0 m, 2.0 m
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Question # 17
Infrared radiation is also known as
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Radio signals
Heat radiation
Magnetic resonance waves
RADAR
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Question # 18
Which of the following pair is correct.
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Rutherford - x-rays
Roentgen - Electron
Chadwick - Neutron
J.J. Thomson -Photon
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Question # 19
Lenses of what diameter are usually not practical.
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Less than 1 m
Larger than 1m
Larger than 5 m
Larger than 10 m
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Question # 20
When two point charges of equal magnitude and opposite sign exist very close to one another the arrangement is called.
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An electric dipole
An amperian current
A null charge
A neutral source
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Question # 21
x-rays can cause fluorescence in materials such as
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Cadmium
Zinc sulphide
Palatinocyanide
All of these
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Question # 22
The charge on an Isolated conductor always lies.
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Within the conductor
At the centre of the conductor
On the surface of the conductor
Outside the surface of the conductor
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Question # 23
Which of the following is the cause of failure of a lens to form a sharp and district image of a white object.
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Spherical aberration
Chromatic aberration
Distortion
Astigmatism
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Question # 24
In case of longitudinal waves the individual particles of the medium move.
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In circles
In ellipses
Parallel to wave propagation
Perpendicular to wave propagation
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Question # 25
The angle subtended at the centre of a circle by an arc equal to its radius is equal to.
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One rotation
One radian
One degree
One revolution
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Question # 26
Which of the following radiations will burn human skin
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Infrared
Ultraviolet
X rays
Alpha particles
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Question # 27
Good acoustic implies
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Obtaining as much reverberations as possible
Making the reverberation as small as possible
Obtaining the optimum of reverberations
Eliminating reverberations
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Question # 28
Optics is the
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Scientific study of light and vision
Scientific study to sound
Scientific study of time
Scientific study of fluid
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Question # 29
The terminal velocity in case of spherical droplet is directly proportional to.
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Square of the radius of the droplet
Radius of the droplet
Cube of the radius of the droplet
Half of the Radius of the droplet half
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Question # 30
On average there is no energy transfer in.
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Sound waves
Water waves
Standing waves
Mechanical waves
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Question # 31
The Inner electrons in heavy atoms can be disturbed and dislodged by.
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X rays
Alpha particle
Beta particles
gama particles
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