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PPSC Physics Full Book MCQs With Answers
Question # 1
The dimension of momentum is.
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[MLT-1]
[ML2T-2]
[ML3T-2]
[MLT-1]
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Question # 2
The SI unit of absorbed dose in.
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Bel
Weber
Rem
Grey
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Question # 3
Who provided theoretical explanation of a blackbody spectrum.
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Einstein
Planck
Wien
stefan
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Question # 4
The total number nucleons in a nucleus are called.
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Mass number
Atomic number
Neutron number
Isotopes
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Question # 5
When ever a system is made to complete a cyclic process the work done during the complete cycle.
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Is zero
Is negative
Is positive
Depends upon the path followed
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Question # 6
Conductance is the reciprocal of.
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Capacitance
Inductance
Resistance
Admittance
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Question # 7
Which material has the greatest di electric constant.
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Mylar
Glass
Germanium
Water
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Question # 8
Any frequency higher than the fundamental frequency of a sound is known as.
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Overtone
Beat
Acoustics
Shockwaves
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Question # 9
Dioptre is the term used for describing the
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Intensity of light
Density of air
Power of light
Refractive index
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Question # 10
The sound waves used sonography are
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Less than 20 KHz
of 20 Khz
Greater than 20 KHz
Of 20 MHz
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Question # 11
Let at constant temperature the pressure of an ideal gas be doubled so that the new volume is.
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Doubled the original volume
Same as original volume
Reduced to half the original volume
Reduced to two times the original volume
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Question # 12
Liquids with disordered structure frozen in are an example of
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Amorphous solids
Glassy solids
Crystalline solids
Polymeric molecules
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Question # 13
Light wave are
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Longitudinal
Transverse
Sometimes longitudinal and sometimes transverse
Neither longitudinal nor transverse
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Question # 14
Some concept of static electricity were introduced by.
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Chinese
Plato
Thales
Archimedes
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Question # 15
Which of the following be used for redeciding mechanical aberration is optical instruments.
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Plane mirrors
Spherical mirrors
Concave lenses
Plano convex lenses
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Question # 16
What is the effect on the product of resistivity and conductivity if the temperature of a conductor is increased.
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It decreases
It increases
It remains the same
It may increase or decrease
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Question # 17
Which of the following factor will not affect the speed of sound i a medium.
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Temperature
Pressure
Humidity
Mass
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Question # 18
In any collision between two bodies there need nor the conservation of
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Linear momentum
Angular momentum
Total energy
Kinetic energy
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Question # 19
A ball is thrown straight up when the ball reaches the highest point.
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Both is velocity and acceleration are zero
In velocity os zero but acceleration is not zero.
It acceleration is zero but velocity is not zero.
Neither velocity nor acceleration is zero.
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Question # 20
Why should the metal casing of an electrical fire be earthen.
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To complete an electrical circuit.
To prevent the fire from overheating
To reduce the risk of electric shocks
To stope the casing from getting too not to touch
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Question # 21
What is the part of a simply D.C. motor that reverses the direction of current through the coil every half cycle.
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Armature
Brushes
Commutator
Slip rings
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Question # 22
A cup of coffee at 80
o
C is left to cool to 30 oc if the heat capacity of the cup and coffee is 2.0 kJ k-1 how much heat is released during the cooling.
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0.04 kJ
100 KJ
60 kJ
160 kJ
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Question # 23
A longitudinal sinusoidal wave has a wavelength of 1 cm and a period of 2s. Its wave velocity is.
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50 cm s-1
0.00t m s-1
100 cm s-1
5 m s-1
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Question # 24
Newton proposed his corpuscular theory on the basis on
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Newton's rings
Polarization
Dispersion of white light
Rectilinear property of light
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Question # 25
The wave form of SHM is a
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Sine wave
Cosine wave
Square wave
Electromagnetic wave
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Question # 26
The buoyancy depends upon the
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Depth to which the body is immersed
Shape of the body
Mass of the body
Mass of the liquid displaced
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Question # 27
The property of an object that causes it to create a magnetic field in opposition to an externally applied magnetic field is.
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Paramagnetism
Diamagnetism
Ferromagnetism
Demagnetism
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Question # 28
On which principle the induction coil works on.
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Self induction
Ampere's rule
Mutual induction
Gauss's law
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Question # 29
The phenomenon of natural radioactivity was discovered by
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Lord Rutherford
James Chadwick
Herie Becquerel
Maria curie
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Question # 30
Young's double slit experiment was performed in
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1801
1916
1901
1934
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Question # 31
The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces
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0
o
120
o
60
o
180
o
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