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PPSC Physics Full Book MCQs With Answers
Question # 1
Interference fringe spacing depends on
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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 # 2
What is true is real images formed by a converging lens.
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they are inverted
They are on the same side of the lens as the object
They can never be shown on a screen
They cannot be seen
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Question # 3
Bernouli's equation includes as a special case of.
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Hook's law
Torricelli's therorem
Third law of motion
Archimedes principle
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Question # 4
In a charged capacitor the energy resides
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In the negative plate
In the positive plate
In the field between the plates
Around the edge of the plates
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Question # 5
The maximum stress a solid material can sustain with out undergoing permanent deformation is called.
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elastic limit
Plastic
elastic deformation
Plastic deformation
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Question # 6
In an electronic transition atom cannot emit
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Gama rays
Visible rays
Infrared rays
Ultraviolet rays
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Question # 7
The thermionic current increases when
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Area of filament is decreased
Area of filament is increased
Temperature is decreased
Work function is increased
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Question # 8
A real object paled inside the focus of a convex lens gives
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Real image but diminshed
Real image but enlarged
virtual image but diminished
Virtual image but enlarged
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Question # 9
The product of velocity and cross sectional are for a liquid flowing through a pipe is a measure of the.
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Rate of flow
Volume of fluid
Fluid pressure
Fluid friction
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Question # 10
If a resistance is connected in parallel with a galvanometer the resulting instrument is called.
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A voltmeter
An ammeter
A wattmeter
A potentiometer
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Question # 11
Magnetic moment is a
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Scalar
Vector
Phasor
Tensor
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Question # 12
The centre of mass of a system is a point where an applied force causes the system to move.
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With rotation
Without rotation
Fastly
Slowly
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Question # 13
In onw cycle of a steam engine there are how many dead centres.
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1
2
3
zero
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Question # 14
An object is -14 cm in front of a convex mirror The image 5.8 cm behind the mirror. What is the focal length of the mirror.
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-4.1 cm
-8.2 cm
- 9.9 cm
-20 cm
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Question # 15
The capture of neutron by a proton results in the formation of.
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Deuteron and gama rays
Deuteron and alpha particle
Triton and Beta particles
Tritron and X rays
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Question # 16
Inductance are measured in
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Coulombs
Volts
Henrys
Farads
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Question # 17
Identify the irreversible process
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Explosion of a bomb
Slow expansion of a gas
Slow compression of a gas
Slow compression of an eleastic spring
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Question # 18
The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so the lens acts as a magnifying glass.
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5 cm
10 cm
15 cm
20 cm
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Question # 19
The sum of the positive and negative peak values is known as.
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Peak value
Average value
Instantaneous value
Peak to peak value
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Question # 20
The air plane lift is based on
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Archimedes principle
Law of conservation of momentum
Bernoulli's principle
Law of conservation of energy
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Question # 21
Neutrino9 is a particle with
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Charge less property and has no spin
Charge less property and has spin
Charge less like electron and has spin
The same property as neutron
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Question # 22
Which of the following is invariant under Galilean transformation.
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Velocity
Impulse
Momentum
Distance
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Question # 23
When a positive charge is allowed to move from positive to negative plate, then it will gain
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P.E.
K.E
Gravitational energy
Electrical P.E.
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Question # 24
Monochromatic ight is of single.
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Frequency
Wave length
Amplitude
Pitch
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Question # 25
Abu abdullah ibn Jabir Al battani was the greatest
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Philospher
Mathematician
Astronomer
Palmist
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Question # 26
The most convenient unit for energy at the atomic level is.
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Joule
Watt second
Newton metre
Electron volt
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Question # 27
In fission reaction, heavy water is used as a
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Coolant
Moderator
Heat exchanger
Controller of reaction rate
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Question # 28
The source of magnetic field are
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Isolated magnetic poles
Electric charge distributions
Current loops
Solenoids
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Question # 29
A large ripple tank with a vibrator working at a frequency of 30 Hz produce 25 complete waves in a distance of 50 cm. The velocity of the wave is.
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9.53 cm s-1
60 cm s-1
750 cm s-1
1500 cm s-1
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Question # 30
The work required to lift a ball of mass 'm' from the surface of the earth to an infinite distance is
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Absolute P.E. of the body
P.E of the body
K.E. of the body
Chemical energy of the body
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Question # 31
An operational amplifiers will act as an inverting amplifier when the input signal is connected to.
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Inverting terminal
Non inverting terminal
Earthened wire
Both a and b
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