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PPSC Physics Full Book MCQs With Answers
Question # 1
A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror What is the object distance.
Choose an answer
-5.0 cm
-7.5 cm
-15 cm
-20 cm
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Question # 2
Why a positive charged object is made neutral by someone touching it.
Choose an answer
Electrons flow from the object
Proton flow onto the object
Protons flow from the object
Proton flow onto the object
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Question # 3
The gravitational force between two bodies does not depends upon.
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The product of their masses
Their separation
The sum of their masses
The constant of gravitation
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Question # 4
An image formed on the film of camera is
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Real , inverted and diminshed
Virtual, inverted and diminshed
Real upright and diminished
Virtual, upright and idminshed
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Question # 5
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 # 6
Why choke coil is used in an AC circuit.
Choose an answer
To decrease D.C.
To increases A.C.
To decreases A.C
To increase D.C
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Question # 7
Which type of microscope was the first to be developed.
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Optical microscope
Digital microscope
Electron microscope
All were developed at the same time
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Question # 8
The power of convex lens is 10 d. At what distance the 3 times larger image is formed.
Choose an answer
9.6 cm
2.3 cm
13.3 cm
17.6 cm
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Question # 9
A transistor can be used as
Choose an answer
Oscillator
Amplifier
Switch
Both a and c
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Question # 10
The mass that appears in Newton's second law is known as.
Choose an answer
Rest mass
Gravitational mass
Inertial mass
Weight
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Question # 11
The direction of induced emf during electromagnetic induction can be determined by making use of.
Choose an answer
Faraday's law
Ampere;s law
Lenz's law
Laplace law
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Question # 12
The point of which the whole weight of the body acts
Choose an answer
zero point
Centre of mass
Centre of gravity
Equilibrium
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Question # 13
First law of thermodynamics is a
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Boyle 's law
Charles' law
Law of energy conservation
Steffen Boltzmann law
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Question # 14
The viscosity of an ideal fluid is
Choose an answer
Infinity
Unity
Zero
0.5
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Question # 15
When a transverse wave is reflected on going from a more dense to a less dense medium.
Choose an answer
There is no phase shift
There is a 180
o
phase shift
There is a phase shift of 360
o
A crest is transformed to a trough
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Question # 16
When the battery is being charged its terminal potential difference than its emf is.
Choose an answer
Less
Greater
Double
Squared root
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Question # 17
In which of the following controlled nuclear chain reaction is used to liberate energy.
Choose an answer
Nuclear bomb
Atomic bomb
Hydrogen bomb
Nuclear reactor
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Question # 18
Which of the following is defined as the amount of heat required to raise the temperature of 1 g of water by 1
o
C
Choose an answer
Joule
BTO
Electron volt
Calorie
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Question # 19
When light emitting diode is forward biased, it emits light of the colour
Choose an answer
Red
Yellow
Green
All of these
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Question # 20
Which of the following is a conserfative force.
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Electric force
Frictional force
Normal force
propulsion force of a rocket
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Question # 21
The SI unit of decay constant is.
Choose an answer
m
m-1
s-1
N m-1
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Question # 22
A wave that consists of oscillations occurring perpendicular to the direction of energy transfer is called.
Choose an answer
Transvers wave
Longitudinal wave
Stationary wave
Shock wave
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Question # 23
The combined resistance of two identical resistors, connected in series is 18 Mega Their combined resistance in a parallel arrangement will be.
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2 Mega
4 Mega
8 Mega
12 Mega
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Question # 24
If the image is virtual then its distance from the lens is taken.
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Positive
Negative
Double
Half
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Question # 25
Which of the following is an electrostatic generator.
Choose an answer
Winshurst machines
Van de Graff generator
Electrophorus
All of the above
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Question # 26
If work must be done by an outside agent attempting tobring two point charges close together.
Choose an answer
They are of opposite signs
The field is not conservative
The work is recoverable when they separate
The P.E. of the charges is reduced by the amount of the work done
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Question # 27
A preset or trimmer can be a.
Choose an answer
Variable resistor
Variable capacitor
Variable inductor
All of these
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Question # 28
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 # 29
The circuit in which current and voltage are in phase the power factor is.
Choose an answer
Zero
Unity
Double
4 times
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Question # 30
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 # 31
Which of the following phenomenon is observed in obtaining an X ray photograph of our hand.
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Photoelectric effect
Zeeman effect
Shadow photography
Ionization
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