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PPSC Physics Full Book MCQs With Answers
Question # 1
Which Russian Physicist first proposed the liquid drop model for the nucleus in 1928
Choose an answer
Niels Bohr
George Gamow
Niel Armstrong
Bill Clinton
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Question # 2
Object may acquire an excess or deficiency of charge by
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Rubbing them together
Grounding them
Applying coulomb's principle
Shielding them
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Question # 3
When a balloon sticks to the whiteboard It is an example of.
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Conoduction
Induction
Polarization
Conservation of charge
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Question # 4
The radius of second orbit of hydrogen atom is
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0.071 A
0.142 A
4.752 A
9.5298 A
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Question # 5
Which configuration is used to connect high impedance source to a low impedance lead.
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CE
CB
CC
BE
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Question # 6
a 2,000 kg heavy truck travelling at 36 km h-1 strikes a tree and comes to a stope in 0.1 s The average force on the truck during the crash is.
Choose an answer
2 x 10
2
N
2 X 10
3
N
2 X 10
4
N
2 X 10
3
N
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Question # 7
When velocity of the body is doubled, which one is doubled too.
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K.E.
P.E
Momentum
Acceleration
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Question # 8
What is world's average surface air temperature.
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5
o
C
10
o
C
15
o
C
20
o
C
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Question # 9
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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Question # 10
The SI unit of absorbed dose in.
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Bel
Weber
Rem
Grey
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Question # 11
The bunding energy per nucleon for iron is.
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zero
Maximum
Negative
Minimum
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Question # 12
If average acceleration is equal to instantaneous acceleration then the body's said to be moving.
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Negative acceleration
Positive acceleration
uniform acceleration
Variable acceleration
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Question # 13
The unit formed by combining the fundamental untis of length , mass and time.
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Absolute units
Practical units
Bse unit
Derived units
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Question # 14
Which of the following type of force can do no work on the particle on which it operates.
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Gravitational force
Frictional force
Centripetal force
Elastic force
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Question # 15
In simple harmonic motion it is found that the total energy of a system.
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Is independent of the amplitude
Depends on the amplitude squared
Is independent of the mass
All of these
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Question # 16
A torch bulb uses a 3 V supply and makes a current of 0.2 A It is switched on for one minute How much electrical energy is used.
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0.6 J
12 J
24 J
36 J
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Question # 17
Which is the best sound source to produce a pure note.
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Tuning fork
Flute
Drum
Harmonium
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Question # 18
A thin layer of oil the surface of water looks coloured due to.
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Pillarization of light
Different elements present in the oil
Interference of light
Transmission of light
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Question # 19
Which of the following a natural example of a capactor.
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Fire
Snow
Air
Lightining
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Question # 20
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 # 21
A cube with sides 2 cm long is made from a material of density 8 g cm -3 What is the density of the block is.
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0.2 g cm-3
0.5 g cm-2
2 g cm-3
5 g cm-3
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Question # 22
When forwarded bias is applied to a junction diode it.
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Increases the potential barrier
Decreases the potential barrier
Reduces the majority carrier current to zero
Reduces the minority carrier current to zero
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Question # 23
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 # 24
A heat engine with 100% efficiency would have to
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Do no work
Be at a uniform temperature
Use no heat
Discharge at 0
o
C
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Question # 25
Which of the given geometries will result in the largest convection consfficient.
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Vertical plate
Diagonal plate
horizontal plate facing upwards
Horizontal plate facing downwards
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Question # 26
The minimum angle of incidence for which total internal reflection can occur is called.
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Right angle
Acute angle
Critical angle
Obtuse angle
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Question # 27
In open circuit electromotive force equal to
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Current
Resistance
Voltage
Inductence
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Question # 28
The field inside a hollow spherical conductor is.
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Constantin zero
Constant but not necessarily zero
A function of charge on sphere
a function of distance from the centre
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Question # 29
A diatomic gas contains only
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Translational K.E.
Rotational K.E.
Vibrational K.E.
All of these
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Question # 30
Two electrons approach each other their relative velocity will be.
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Zero
c
c/2
Infinity
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Question # 31
In the experiment of production of X rays electrons are accelerated towards the anode by
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Thermionic emission
Potential difference
Breaking potential
Cut of current
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