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PPSC Physics Full Book MCQs With Answers
Question # 1
A boat loving at constant speed 'v' through still water experiences a total frictional drag F what is the power developed by the boat.
Choose an answer
1/2 Fv
Fv
1/2 Fv2
Fv2
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Question # 2
An alternating current can be produced by
Choose an answer
Turbine
Electric motor
Generator
Trnasormer
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Question # 3
Which of the following is invariant under Galilean transformation.
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Velocity
Impulse
Momentum
Distance
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Question # 4
A solid state detector is basically
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A reverse biased p-n junction
A forward biased p-n junction
A p-n -p transistor
A n-p-n transistor
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Question # 5
When a solid is melting the temperature remains constant even through heat is being supplied because the
Choose an answer
Heat is being used to break up the intermolecular bonds
Solid is not absorbing any heat
Molecules are moving faster
Molecules are farther a part
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Question # 6
The value of critical angle of glass is
Choose an answer
45
o
42
o
48
o
52
o
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Question # 7
When a positive charge is allowed to move from positive to negative plate, then it will gain
Choose an answer
P.E.
K.E
Gravitational energy
Electrical P.E.
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Question # 8
On which parameter internal energy of an ideal gas depends upon.
Choose an answer
Volume
Mass
Pressure
Temperature
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Question # 9
Why should household appliances be connected in parallel with the voltage source.
Choose an answer
To increase the resistance of the circuit
To decreases the resistance of the circuit
To provide each appliance the same voltage as the power source
To provide each appliance the same current as the power source.
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Question # 10
The maximum energy of photons emitted from ab X rays tube is certain to be increased by
Choose an answer
Increasing the voltage across the tube
Decreasing the voltage across the tube
Heating the metal target
Putting a barrier in the way of photons
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Question # 11
Two bullets a and b have masses 1 kg and 12 kg respectively.
Choose an answer
K.E. of B will be twice that of A
K.E. of A will be twice that of B
Both have same K.E.
K.E. of A will be half that of B
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Question # 12
The strength per unit volume of a solid is called.
Choose an answer
shear stress
Shear strain
Bulk strength
Bulk modulus
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Question # 13
In case of a convex lens when object is placed away from 2F, image is formed.
Choose an answer
at F
at 2F
away from 2 F
Between F and 2 F
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Question # 14
The process of mixing sound waves with carrier waves is known as.
Choose an answer
Rectification
amplification
Modulation
Demodulation
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Question # 15
A bus and a car moving with the same K.E. are acted upon by the same retarding force then the
Choose an answer
car will stop first
Bus will stop first
Both will stop simultaneously
Both will never stop
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Question # 16
In scientific notation 0.0003 can be written as.
Choose an answer
3 x 10
4
3 x 10
-4
3.0 x 10
3
3.0 x 10
-3
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Question # 17
A deuteron is
Choose an answer
A type of proton
A proton neutron bounded to gather.
A type of beta particle
A type of neutron
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Question # 18
The consumption of energy by a 60 W bulb in 2 s is
Choose an answer
0.02 J
30 J
60 J
120 J
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Question # 19
A man in an elevator descending with an acceleration will conclude that his weight has
Choose an answer
Increased
Decreased
Constant value
Zero value
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Question # 20
Natural radioactivity was discovered in.
Choose an answer
1978
1896
1904
1906
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Question # 21
The vertical component of earth's magnetics field is zero.
Choose an answer
At magnetic poles
At geographical poles
At magnetic equator
Everywhere
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Question # 22
If an athlete uses 50 J of energy to lift a load in 2 s his muscular power is.
Choose an answer
125 W
250 W
500 W
1,000 W
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Question # 23
What is generated when air moves an air foil.
Choose an answer
Thrust
Lift
Drag
Turbulence
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Question # 24
The band of colours is called.
Choose an answer
Spectrum
Prism
Medley
LASER
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Question # 25
Which instrument measures the magnification of a telescope.
Choose an answer
lactometer
dynamometer
Wattmeter
Ammeter
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Question # 26
Difference between Cp and Cv is equal to
Choose an answer
General gas constant
Planck's conatant
Molar gas constant
Boltzmann's constant
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Question # 27
The fluid which is incompressible and non viscous is called.
Choose an answer
Viscous fluid
Nonideal fluid
Ideal fluid
Perfect fluid
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Question # 28
The relation between refractive index an critical angle is.
Choose an answer
sin C =1/n
sin n = 1/C
sin c = 1
n = sin C
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Question # 29
Which of the following is dimensionless.
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Strain
Stress
Pressure
Volume
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Question # 30
Who suggested that energy is radiated or absorbed in discrete packers called quanta.
Choose an answer
Max. Planck
Stefan
Lummer
Boltzmann
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Question # 31
Which are different types of emission spectrum
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Continues spectrum
Line spectrum
Band spectrum
all of the above
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