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PPSC Physics Full Book MCQs With Answers
Question # 1
What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added.
Choose an answer
Increases
Decreases
Remains the same
Cannot be predicted
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Question # 2
The three law of motion first published in 1687 by Sir Issac Newton in his work.
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Method of Fluxions
Optics
Principal Mathematica
Arithmetic Universalism
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Question # 3
The law of inertia was first time formulated by
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Galileo
Newton
Kepler
Planck
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Question # 4
Thermocouple is used for
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Converting atomic energy into heat energy
Measure the radiant energy
Storing the heat energy
Measuring current
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Question # 5
When a body is lifted through a height 'h' the work done on the body appears in the form of.
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K.E
P.E
Heat
Density
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Question # 6
What is the basic advantage of class A operation of an amplifier.
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It has high efficiency
It has high gain
It has low distortion
It has high distortion
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Question # 7
If velocity is doubled then
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Momentum increase 4 time and K.E. increase 2 times
Momentum increases 2 times and K.E. remains constant
Momentum increases 2 times and K.E. increases 4 times
Both momentum and K.E. remain constant
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Question # 8
The time period of a simple pendulum is independent of its.
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Length
Mass
Acceleration due to gravity
Restoring force
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Question # 9
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 # 10
Faraday's law was deduced in
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1826
1831
1836
1841
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Question # 11
If a force of 10 N makes an angle of 30
o
with x-axis its component is given by
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1.866 N
8.66 N
0.89 N
0.866 N
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Question # 12
Max. Planck was awarded Nobel prize in.
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1916
1918
1921
1923
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Question # 13
When a charged particle moves through a magnetic field it suffers a change in its
Choose an answer
Charge
Mass
Energy
Direction of motion
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Question # 14
Which of the following pair is correct.
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Rutherford - x-rays
Roentgen - Electron
Chadwick - Neutron
J.J. Thomson -Photon
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Question # 15
In the gas equation PV =nRT , V is the volume of.
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1 g of gas
1 L of gas
1 mol of gas
1 kg of gas
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Question # 16
The maximum height reached by a projectile with a velocity of 14 m s-1 at an angle of 30
o
with the horizontal is.
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1.5 m
2.5 m
1 m
2 m
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Question # 17
Which of the following is renewable source of energy.
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Oil
Natural gas
Uranium
Sunlight
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Question # 18
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 # 19
The specific heat capacity of a substance is the amount of heat required to.
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Raise its temperature by 1 K
Raise the temperature of 1 kg of the substance by 1 K
Melt 1 kg of the substance
Boil 1 kg of the substance
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Question # 20
When objects placed in a room are exposed to X- rays they appear
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Violet
Visible
Red
Invisible
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Question # 21
How solid hydrogen is obtained.
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By cascade process
By joule kelvin effect
By adiabatic expansion
Lowering temperature below melting point
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Question # 22
Plane polarized light can be produced by
Choose an answer
Reflection
Refraction
Scattering of light
All of these
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Question # 23
Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P.
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0.02
0.25
0.33
0.50
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Question # 24
the ratio of applied stress to volumetric strain is called.
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shear modulus
Bulk modulus
Young's modulus
elastic limit
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Question # 25
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 # 26
Which of the following is formed by decay of a free neurton.
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A number of electrons
Two protons
A proton and an electron
An alpha particle
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Question # 27
Mass -energy relation means that the product of mass times the square of the speed of light must be equal to.
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Torque
Momentum
Energy
Impulse
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Question # 28
The branch of medicine which deals with the anatomy physiology and diseases of the eye
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Ophthalmology
Radiology
Cardiology
Andrology
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Question # 29
When an electron and a positron are annihilated, then number of protons produced is.
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1
2
3
4
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Question # 30
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 # 31
The penetrating power of X rays is least with materials of.
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High mass density
High volume density
High electron density
High weight
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