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PPSC Physics Full Book MCQs With Answers
Question # 1
What would be the magnitude and direction of acceleration which would made the spring balance reading zero.
Choose an answer
Zero
1 m s-2 upward
9.8 m s-2 upward
9.8 m s-2 downward
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Question # 2
The average energy released per fission of U is about
Choose an answer
200 eV
2 keV
2 MeV
200 MeV
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Question # 3
The converse of pair production is
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Annihilation of matter
Materialization
Compton effect
Photo electric effect
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Question # 4
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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Question # 5
The cathode ray oscilloscope is used
Choose an answer
For viewing the wave shape of rapidly changing electric current
As voltmeter
For measuring time intervals between electricalimpulses
All of the above
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Question # 6
The centre of gravity of a body is
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The centre of the body
The point at the mass of the body acts
The point at which the whole weight of the body acts
The point of rotation
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Question # 7
Which of the following phenomenon occurs when two sound waves of equal amplitude and different frequencies travel through the same region.
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Doppler's effect
Resonance
Beats
Echo
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Question # 8
The particles less in mass than protons are
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Measons
Bosons
Baryons
Nucleons
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Question # 9
Which both elements are good for nuclear fission.
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Thorium an uranium
Thorium and radium
Plutonium and uranium
Plutonium and throrium
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Question # 10
The half life of uranium -238 is
Choose an answer
1620 years
4.5 x 10
9
years
3-8 days
23.5 minutes
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Question # 11
A convex lens of focal length 6 cm to be used to from a virtual image three times the size of the object Where must the lens be placed.
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1 cm
2 cm
3 cm
4 cm
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Question # 12
In case of longitudinal waves the individual particles of the medium move.
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In circles
In ellipses
Parallel to wave propagation
Perpendicular to wave propagation
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Question # 13
What happens to internal energy of a piece of lead when hammered.
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Increases
Decreases
Remains unchanged
Becomes zero
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Question # 14
An object moves 5.0 m north and then 3.0 m south . Find both the distance travelled and the magnitude of the displacement vector.
Choose an answer
2.0 m, 8.0 m
8.0 m, 2.0 m
8.0 m, 8.0 m
2.0 m, 2.0 m
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Question # 15
Who discovered a phenomenon of thermos electricity.
Choose an answer
Peltier
Joule
Seeback
thomson
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Question # 16
The permeability of a diamagnetic material is
Choose an answer
Greater than unity
Less than unity
Equal to unity
Zero
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Question # 17
The wave nature of light was proposed by
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Thomas Young
Fresnel
Maxwell
Huygen
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Question # 18
The phase velocity is the velocity of a point that moves with a wave at constant phase it is also called.
Choose an answer
Phase speed
Wave speed
Wave velocity
All of these
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Question # 19
Which part of hole located in the centre of the eye that allows light to enter the retina.
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Iris
Pupil
Cornea
Fovea
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Question # 20
The direction of force on a moving negative charge will be.
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Opposite to that of positive charge
Similar to that of positive charge
At right angel to the positive charge
Parallel to the positive charge
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Question # 21
The terminal velocity in case of spherical droplet is directly proportional to.
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Square of the radius of the droplet
Radius of the droplet
Cube of the radius of the droplet
Half of the Radius of the droplet half
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Question # 22
Condenser is used
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To produce charge
To change the direction of current
To collect the charge
As a good conductor of electricity
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Question # 23
The emission of electrons from a metal surface when exposed to light of suitable frequency is called.
Choose an answer
Pair production
Compton effect
Photo electric effect
Zeeman effect
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Question # 24
The typical value of forbidden energy gap in germinium is.
Choose an answer
0.7 eV
1.0 eV
1.4 eV
10 eV
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Question # 25
The branch of medicine which deals with the anatomy physiology and diseases of the eye
Choose an answer
Ophthalmology
Radiology
Cardiology
Andrology
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Question # 26
Which of the following should not change in an Isothermal process.
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Volume
Pressure
Temperature
All of these
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Question # 27
If we double both the current and the voltage in circuit while keeping its resistance constant the power.
Choose an answer
Remains unchanged
Halves
Doubles
quadruples
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Question # 28
The bending of light when it enters a medium
Choose an answer
Reflection
Refraction
Diffraction
Total internal reflection
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Question # 29
An example of simple harmonic motion is
Choose an answer
Fast moving cricket ball
Motion of bicycle
Motion of a bee
Motion of simple pendulum
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Question # 30
To produce beats it is necessary to use two waves.
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Travelling in opposite direction
Of slightly different frequencies
Of equal wavelengths
Of equal amplitudes
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Question # 31
Which scientist announced for the first time that the universe is expanding.
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Einstein
Newton
Edward Hubble
Karl Marx
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