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PPSC Physics Full Book MCQs With Answers
Question # 1
Which was the transparent front part of the eye that covers the pupil, iris and interior chamber.
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Cornea
Fovea
Sclera
Choroid
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Question # 2
Sunlight can undergo total internal reflection if it enters from
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Glass to air
Air to glass
Air to water
Water to glass
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Question # 3
The electric heater takes a current of 4 A from a 250 V supply . How long would it take the heater to convert 400,000 J of electric energy.
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100 s
200 s
400 s
750 s
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Question # 4
The cloud chamber was invented by C.T.R. Wilson in
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1905
1907
1909
1911
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Question # 5
The law of equation of energy is applicable to the system whose constituents are.
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At rest
In orderly motion
in random motion
Moving at constant speed
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Question # 6
The wave phenomenon that classifies light as a transverse wave is.
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Polarization
Diffraction
Interference
Refraction
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Question # 7
If the K.E. of a body becomes 4 times of its initial value, the new momentum will be
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half
Same
Double
4 times
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Question # 8
Law of increase of entropy is a result of
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First law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics
Zeroth law of thermodynamics
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Question # 9
Real gases obey gas laws only at
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Low pressure and high temperature
High pressure and low temperature
High pressure and high temperature
Low pressure and low temperature
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Question # 10
Commutator was invented in
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1820
1830
1834
1840
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Question # 11
An electric motor could be used as a
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Battery
Capacitor
Dynamic
Transofrmer
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Question # 12
The point midway between the lens surface on its participial axis
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Optical centre
Principal focus
Focal plane
Focal length
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Question # 13
Alpha particles emitted from a radioactive material are.
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He nucliei
H -nucliei
Li nucliei
B nucliei
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Question # 14
Which of the following quantity has a unit that can be expressed in terms of just two different SI base units.
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Area
Change
Electric current
Length
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Question # 15
The core of a transfer is made of iron because
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Iron is a good electric material
Iron is cheaper than copper
Iron is easily magnetized and demagnetized
Iron makes a good permanent magnet
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Question # 16
A body is in a static equilibrium, only when it is
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Moving with uniform velocity
Moving with variable velocity
Moving with uniform acceleration
at rest
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Question # 17
A car is travelling on a level highway at at speed of 15 m s-1. A braking force of 3,000 N brings the car to stop in 10 s The mass of the car is.
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1500 kg
2,000 kg
2,500 kg
3,000 kg
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Question # 18
Which of the following properties of light does not very with the nature of the medium.
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Amplitude
Frequency
Wavelength
Time period
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Question # 19
Which we double the voltage in a simple electric circuit, we double the
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Current
Power
Resistance
Both a and b
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Question # 20
The variation of focal length of a lens when we pass from the central portion to periphery is called.
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Coma
Astigmatism
Spherical aberration
Chromatic aberration
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Question # 21
Sound of frequencies lower than 20 Hz are called.
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Supersonics
Infra sonics
Ultrasonic
Audible sound waves
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Question # 22
The SI unit of momentum is.
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kg m s-2
kg m2 s-2
kg m s-1
kg s-1
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Question # 23
In an isochoric process.
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Volume changes
Pressure changes
Temperature changes
Volume remains constant
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Question # 24
MT-2 is the dimensionless formula of.
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Moment of iniertia
Viscosity
surface tension
Angular acceleration
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Question # 25
Which of the following causes the deflection of Alpha particles when they re passed through a thin foil.
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Attraction of nucleus
Collision with nuclei
Interactions with electrons
Electrostatic repulsion by the nucleus
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Question # 26
Distance covered by a freely failing body in 2 s will be.
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19.6 m
4.m
39.2 m
44.1 m
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Question # 27
When a wire moves perpendicularly to a magnetic field, the induced emf does ot depends upon
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The velocity of the wire
The resistance of the wire
The flux density of the magnetic
The orientation of the wire field
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Question # 28
Which are different types of emission spectrum
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Continues spectrum
Line spectrum
Band spectrum
all of the above
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Question # 29
Fringe spacing in double slit experiment can be increased by decreasing.
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Wavelength of light
Width of slits
Slite separation
Distance between the slits and screen
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Question # 30
Charge carriers in thermocouples are.
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Anions
Cations
Electrons
Protons
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Question # 31
The quality of sound
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Decreases with pitch
Varies directly as its pitch
Varies inversely as its pitch
Depends upon the overtones present there
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