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PPSC Physics Full Book MCQs With Answers
Question # 1
An electric motor could be used as a
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Battery
Capacitor
Dynamic
Transofrmer
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Question # 2
Which of the following is a non contacting device that intercepts and measures thermal radiation.
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Thermometer
Pyrometer
Voltmeter
Lactometer
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Question # 3
The scientific theory concerning the coming into existence of universe.
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Cosmology
Cosmogony
Cosmography
Cosmos
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Question # 4
A body is termed as perfectly elastic if.
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It can move freely
Its surface is perfectly somooth
It is not affected by an external force
It recovers the original shape when the deforming force is remover
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Question # 5
A magnetic field is said to exist at a point if
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A force is exerted on a charge placed at that point
A magnetic pole exists at that point
An ampersand current loop surrounds the point
A force not felt by a static charge acts on a moving charge placed at that point
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Question # 6
The practical efficiency of a heat engine is
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25% to 30.5 %
35% to 45%
30% to 45%
15% to 25%
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Question # 7
Which Isotopes is use din radioactive dating.
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C
12
C
13
C
14
C
16
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Question # 8
In an elastic collision
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K.E. is conserved
Both K.E. and momentum are conserved
K.E. is not conserved
Only momentum is conserved
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Question # 9
The direction of induced emf during electromagnetic induction can be determined by making use of.
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Faraday's law
Ampere;s law
Lenz's law
Laplace law
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Question # 10
Which of the following will not acceleation.
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The moon in its orbit
A tennis ball rebounding from ground
A store in free fall
A car in which the engine thrust is equal to the friction
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Question # 11
In annitilation of matter, positron and electron pair disappears into two
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Alpha particles
Beta particles
Game particles
X-rays
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Question # 12
Which is the famous standard model of the universe.
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the big bang
Casmos
Astronaut
The small stap
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Question # 13
A device which converts electrical energy into mechanical energy is called.
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A.C generator
D.C. generator
Motor
Commutator
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Question # 14
The capacitance of a capacitor increases with a decreases in.
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Plate area
Permitivity
Plate separation
Dielectric constant
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Question # 15
A sheet of transparent material with fine equality spaced lines ruled parallel on its surface is called.
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Interferometer
Grating element
ruler
Patch
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Question # 16
When of the following radiations are not emitted by electron transitions in atoms.
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Visible rays
Ultraviolet rays
Infrared radiations
Alpha particles
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Question # 17
The value of voltage or current that exists in a circuit at any instant of time measured from some reference point is its.
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Peak value
Peak to peak value
Instantaneous value
Average value
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Question # 18
All particles, of a wave front vibrate
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In same phase
In opposite phase
Upward down
Left and right
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Question # 19
The permittivity of a medium.
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Is a measure of the density
Is equal to unity for air
Depends on the charge derisory of the medium
Determines the magnitude of an electric field that can be established by the medium
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Question # 20
A rectangular block has length 6 cm, width 5 cm and height 10 cm Its mass is 150 g The density of the block is
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0.2 g cm-3
0.5 g cm-3
2 g cm-3
5 g cm-3
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Question # 21
The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.
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Nuclear stability
Radioactivity
Carbon dating
Spontaneously
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Question # 22
A pair of point charges with equal magnitude and opposite sign separated by a distance 'r' produce.
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Electric dipole
Electric charge
Electric field
electric arc
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Question # 23
No entropy change is associated with
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Isothermal process
Adiabatic process
Isochoric process
Isoteric process
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Question # 24
The polarization of an electromagnetic wave is determined by
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The magnetic field
The electric field
The electric and magnetic fields
The field direction of propagation of electromagnetic waves
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Question # 25
Which of the following measures how quickly the thermometer liquid mainly because it
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Is coloriess
Is a bad conductor of heat
Does not expand linearly
Has a low boiling point
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Question # 26
What is the power rating of a lamp connected to a 12 V source when it carries 2.5 A.
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4.8 W
14.5 W
30 W
60 W
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Question # 27
Convention is the transfer of thermal energy by means of currents in
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Pressure
Temperature
Liquids
Fluids
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Question # 28
Which one of the following solids exhibits only shot range order.
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Amorphous solids
Polymeric solids
Crystalline solids
Metals
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Question # 29
The venturimeter is an instrument used for measuring the
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Viscosity of a liquid
Flow speed of a liquid
Compressibility of a fluid
Specific gravity of a liquid
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Question # 30
Who measured the intensity of emitted energy with wavelength radiated from a blackbody at different temperature.
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Lummer
Pringsheim
stefan
Both a and c
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Question # 31
Which of the following is an example of continuous spectra.
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Black body radiation spectrum
Molecular spectra
Atomic spectra
grating spectrum
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