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PPSC Physics Full Book MCQs With Answers
Question # 1
The product of mass and specific heat of a substance is called.
Choose an answer
Latent heat
Water equivalent
Atomic heat
Heat capacity
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Question # 2
Lenses are commonly made of.
Choose an answer
Glass only
Plastic only
Glass and clear plastic
Aluminium
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Question # 3
The mains frequency in Pakistan is
Choose an answer
20 Hz
50 Hz
40 Hz
60 Hz
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Question # 4
Who discovered a relation between electric and magnetic field.
Choose an answer
Hans Christian Oersted
Michelson Faraday
Lenz
Hertz
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Question # 5
At what speed the mass of a body will be doubled.
Choose an answer
0.67 C
0.77 C
0.87 C
0.97 C
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Question # 6
Which of the following is non renewable source of energy.
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Wind
Coal
Hydroelectric
Biomass
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Question # 7
A voltmeter is a
Choose an answer
High resistance galvanometer
Low resistance galvanometer
Zero resistance galvanometer
Infinite resistance galvanometer
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Question # 8
The surface of a liquid is somewhat similar to a stretched membrane because.
Choose an answer
There is an elastic stress in the surface
Tension in the surface increases if the area is increased
The surface has a natural tendency to contract
Ripples can be produced on the surface
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Question # 9
How much large is the proton mass than the electron mass.
Choose an answer
1536
1636
1736
1836
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Question # 10
A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.
Choose an answer
9.8 N
29. 6 N
26.5 N
30.5 N
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Question # 11
The reluctance of a body to start moving is called.
Choose an answer
Mass
Weight
Force
Inertia
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Question # 12
A bulb of 100 W is connected to a 160 V supply What will be the power consumed.
Choose an answer
25 W
30 W
50 W
64 W
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Question # 13
Who proposed that light energy travels in space by means of wave motion.
Choose an answer
Maxwell
Planck
De-Broglie
Huygen
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Question # 14
A step up transformer has a turn ratio of 1:100 A voltage of 20 V is connected across the primary coil What is the secondary voltage.
Choose an answer
0.2 V
5 V
100 V
2000 V
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Question # 15
Frequency less than 120 Hz are known as
Choose an answer
Infrasonic
Ultra sonics
Super sonics
Infrared
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Question # 16
Which is the best sound source to produce a pure note.
Choose an answer
Tuning fork
Flute
Drum
Harmonium
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Question # 17
Power of lens is measured in
Choose an answer
cm
Metres
cm-1
Dioptres
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Question # 18
The term used for heat capacity per unit mass is.
Choose an answer
Latent heat
Specific heat
Energy density
Specific energy
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Question # 19
A single silicon photovoltaic cell produces a current of the order of.
Choose an answer
A few miliamperes
10
2
A
10
3
A
10
4
A
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Question # 20
The binary equivalent of 25 is
Choose an answer
111001
11001
1001
10101
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Question # 21
The phenomenon of exactly zero electrical resistance occurring in certain materials below a characteristics temperature is called.
Choose an answer
Resistivity
Conductivity
Super conductivity
Volume resistivity
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Question # 22
Which particle interact via all fundamental forces.
Choose an answer
Leptons
Hadrons
Muons
mesons
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Question # 23
Interference fringe spacing depends on
Choose an answer
The wavelength of light used
The distance screen from the coherent sources
Separation between the sources
All of the above
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Question # 24
In a diffraction pattern, the width of any fringe is.
Choose an answer
Directly proportional to slit width
Inversely proportional to slit width
independent of slit width
Zero
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Question # 25
Which of the following proves that light waves are transverse in nature.
Choose an answer
Diffraction
Interference
Polarization
Refraction
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Question # 26
The fluid which is incompressible and non viscous is called.
Choose an answer
Viscous fluid
Nonideal fluid
Ideal fluid
Perfect fluid
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Question # 27
What is the basic advantage of class A operation of an amplifier.
Choose an answer
It has high efficiency
It has high gain
It has low distortion
It has high distortion
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Question # 28
What kind of movement is dictated by the laws of thermodynamcis.
Choose an answer
Energy motion
Heat work
Light heat
Energy light
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Question # 29
The pressure necessary to liquify a gas at the critical temperature is called.
Choose an answer
Normal pressure
Atmospheric pressure
Critical pressure
Liquid pressure
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Question # 30
Which of the following scientists is known for his exceptional work in the field of optics.
Choose an answer
Albert Einstein
Issac Newton
Ibn al Haithem
Alberuni
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Question # 31
In the case of forced oscillations frequency of oscillation is.
Choose an answer
The natural damped frequency
The natural undamped frequency
The frequency of the external periodic force
Some other frequency
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