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PPSC Physics Full Book MCQs With Answers
Question # 1
The output of two input OR gate is zero only when its.
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Either input is one
Either input is zero
Both inputs are zero
Both inputs are one
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Question # 2
The cosine of the phase angle between the current and voltage in an A.C. circuit is called the
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Lead factor
Lag factor
Dissipation factor
Power factor
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Question # 3
Thermodynamics concern its primary with the
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Measurement of quantity of heat
Physical effects of temperature changes
Conversion of heat into other energy forms
Behavior of gases
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Question # 4
A relationship between mechanical work and heat energy was firstly established dby.
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Davy
Count Rumford
Joule
Kelvin
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Question # 5
The loudness of a sound deepness on its
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Wavelength
Frequency
Wave amplitude
Regularity
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Question # 6
What is the average K.E. of gas molecules at temperature equal to K.
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kt/3
3/2 KT
1/2 KT
2/3 KT
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Question # 7
A leser beam may be used to measure very large distance because it is.
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Unidirectional
Cohernet
Monochromatic
Not absorbed
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Question # 8
Which Isotopes is use din radioactive dating.
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C
12
C
13
C
14
C
16
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Question # 9
Angular simple harmonic motion is.
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Periodic rectilinear motion
Independent of any applied torque
Periodic rotational motion
Never defined
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Question # 10
Simple harmonic motion may be assumed as a projectio of uniform circular motion along a
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Diagonal
hypotenuse
Diameter
Radius
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Question # 11
Which Muslim Scientist gave the first clear description and correct analysis of pinhole camera.
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Nasir al Din Al tusi
Ibn al Haithem
Ibn Ishaqal kundi
al -Khawarizmi
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Question # 12
Which term best describes the nature of light from modern view point.
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Waves
Rays
Particles
Photons
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Question # 13
A pencil dipped partially into water appears bent because of.
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Reflection of water surface
Diffraction of water surface
Refraction of water surface
Water is a fluid
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Question # 14
On which temperature scale a degree is 1/180 of the interval between the freezing point and the boiling point.
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Celsius scale
Fahrenheit scales
Rankine scale
Kelvin scale
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Question # 15
Which experiment is a demonstration that matter and energy can display properties of both waves and particles.
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young's double slit experiment
Division germier experiment
Heisenberg's uncertainty experiment
Stern Gerlach experiment
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Question # 16
When a posirtron is emitted it causes.
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Mass number to increase by one
mass number to decrease by one
Atomic number to decrease by one
Atomic number to increase by one
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Question # 17
For which of the following objects is the centre of mass equidistant from every point on its surface
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An unsharpened pencil
A gramophone record
An egg
A table tennis ball
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Question # 18
Which of the following is a unit of electric field strength.
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c m-1
v m-2
N C-1
N V-1
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Question # 19
In any L-C-R circuit
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Current lags the applied voltage
Current leads the applied voltage
Current sometimes leads and sometimes lags the applied voltage
Current remains in phase with voltage
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Question # 20
If D1 and D2 are the powers of two lenses placed in contact then the power of the combination will be.
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D1+D2
D1-D2
D1/D2
D1 x D2
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Question # 21
Gauss's law a most useful in cases where the charge distributions.
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Are made up of discrete point charges
Are finite in their spatial extent
Give rise to inverse square law fields
Posses a certain amount of symmetry
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Question # 22
when a body accelerates.
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Its direction always changes
Its mass always changes
Its velocity always changes
It falls towards the earth
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Question # 23
The phase different between the particles vibrating's between two consecutive nodes is.
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0
Lamda /2
2
2 lamda
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Question # 24
The amplitude of a vibrating body at resonance place in vacuum is.
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zero
Maximum
Minimum
Infinite
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Question # 25
The central ring is bright in case of Newton's rigs produced by
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Reflection
Wedges
Refraction
Transmission
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Question # 26
Which given quantity remains the same in isotones.
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Mass number
Atomic number
Number of neutrons
Number of protons
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Question # 27
One particle having zero mass and zero charge is.
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Positron
Electron
Neutrino
Neutron
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Question # 28
Which of the following physical quantity has different units as compared to others.
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Weight of a body
Tension of a string
Buoyant force
Electromotive force
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Question # 29
if the line of action of force passes through the axis of rotation of origin, then torque is.
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Maximum
Negative
Zero
1
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Question # 30
Light entering glass will not suffer change in
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Frequency
wavelength
Speed
Direction
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Question # 31
The phenomenon in which a photon of frequency 'f' is scattered by an electron and the scattered photon has frequency f <f is known as.
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Pair production
Pair annihilations
Photoelectric effect
Compton's effect
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