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PPSC Physics Full Book MCQs With Answers
Question # 1
Which of the following pair is correct.
Choose an answer
Rutherford - x-rays
Roentgen - Electron
Chadwick - Neutron
J.J. Thomson -Photon
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Question # 2
There are how many modes of operations of a BJT.
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2
3
4
5
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Question # 3
The angular frequency time period and frequency in SHM not depend upon.
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Mass
Force constant
Amplitude
Restoring force
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Question # 4
From any substance the temperature and pressure at which the material can coexist in all three states in equilibrium is called.
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Critical point
Triple point
Initial point
Final point
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Question # 5
The ratio of specific heat capacity to motor heat capacity of a body
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Is a universals cantante
Depends upon the mass of the body
Depends upon the molecular weight of the body
Is dimensionless
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Question # 6
The heat required to sublime one mole of the substance at standard temperature and pressure is called.
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Latest heat
Specific heat
Heat of sublimation
Heat capacity
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Question # 7
In rotational motion, the analogue of force is.
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moment of inertia
Moment of force
Torque
Rotational inertia
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Question # 8
The force that bonds protons and neutrons together int he nucleus despite the electrical repulsion of the protons is called.
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Molecular force
Nuclear force
Atomic force
Gravitational force
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Question # 9
Dioptre is the term used for describing the
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Intensity of light
Density of air
Power of light
Refractive index
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Question # 10
If a liquid does not wet a solid surface, the angle of contact is.
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Less than 90
o
Greeter than 180
o
90
o
Between 90
o
and 180
o
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Question # 11
The are between the velocity time graph and the time axis is numerically equal to.
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Distance moved by the object
Speed of the object
Velocity of the object
Acceleration of the object
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Question # 12
The efficiency of Carnot engine is
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Less than one
Zero
Greeter than one
Infinite
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Question # 13
Transistors with various combinations are widely used as switches in.
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electric generators
Rectificers
Amplifiers
Computers
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Question # 14
When net force acting on a system is zero which of the following will be constant.
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Force
Linear momentum
Angular momentum
Linear impulse
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Question # 15
The mass of proton is equal to.
Choose an answer
1.673 x 10
-27
kg
1.673 x 10
27
kg
9.1 x 10-31 kg
9.1 x 10
31
kg
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Question # 16
A device used to detect and measure charge is.
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A voltmeter
An ammeter
An electroscope
An amplifier
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Question # 17
If the average velocity of an object zero in some time interval, the displacement of the object for that interval will be.
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Infinite
Zero
Increasing
Decreasing
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Question # 18
The resistance of a capacitor when it is connected with a battery is.
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Zero
Finite
Infinite
The same
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Question # 19
When a vector is multiplied by a negative number its direction.
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Remains unchanged
Changes by 180
o
Becomes horizontal
Vertical to each other
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Question # 20
Bracket and plunk series of spectral lines lye in the
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Visible region
Ultraviolet region
Far infrared region
Infrared region
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Question # 21
What type of process is the Carnot's cycle.
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Reversible
Irreversible
Neither reversible nor irreversible
May be reversible or irreversible
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Question # 22
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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Question # 23
Mostly widely used types of gas LASER are.
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Neon
Argon ion
Helium
All of these
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Question # 24
The 1st condition of equilibriums satisfied if.
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Linear acceleration is zero
Angular acceleration is zero
The vector sum of all the forces is zero
The vector sum of all the torque is increase
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Question # 25
The constant lamda is called the.
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Decay constant
Gas constant
Planck's constant
Dose constant
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Question # 26
A body of mass 2 kg is suspended from the celling of an elevator moving up with an acceleration 'g' its apparent weight in the elevator will be.
Choose an answer
9.88 N
19.8 N
29.4 N
39. 2 N
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Question # 27
In any collision between two bodies there need nor the conservation of
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Linear momentum
Angular momentum
Total energy
Kinetic energy
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Question # 28
The use fulness of x rays is largely due to their
Choose an answer
Mass
Density
Penetrating power
Rest mass
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Question # 29
One weber is equal to.
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N A-1
N m-1 A
N mA-1
N m-1 A-1
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Question # 30
The half life of isotopes X is four days and its initial mass is 32 mg What mass of the isotope X will remain after twelve days.
Choose an answer
2 mg
4 mg
8 mg
18 mg
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Question # 31
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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