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PPSC Physics Full Book MCQs With Answers
Question # 1
who discovered taht mass and energy are forms of each other.
Choose an answer
Issac Newton
Albert Einstein
Galileo
Khawarizmi
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Question # 2
The image formed on the film of a simple camera is.
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Real inverted and diminished
Virtual, upright, and diminished
Virtual, upright and magnified
Real, inverted and magnified
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Question # 3
In a n-type material there is an excess of.
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Free electrons
Holes
Quarks
Measons
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Question # 4
Which of the following is a set of supplementary units.
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Radian and steradian
Radian and mole
Steradian and candela
Radian and kelvin
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Question # 5
A plug connoted to a table lamp contains a 3 A fuse Why is the fuse needed.
Choose an answer
To increase the resistance of the circuit
To make it easier for the current to flow
To protect the wiring form overheating
To reduce the voltage across thelamp
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Question # 6
A fluid is said to be ideal if it is
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Non viscous
Non viscous and incompressible
Non viscous and with steady flow
Non viscous incompressible and has steady flow
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Question # 7
Which of the following cannot be polarized.
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Ultraviolet rays
Radio waves
T.V waves
Sound waves
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Question # 8
Thermal conduction in metals differs from thermal conduction in insulators,. The reasons for this is that , in metals heat can be transported by.
Choose an answer
Electrons
Lattice vibrations
Photons
Positive ions
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Question # 9
In CE amplifier phased reversal occurs when the output voltage is taken between
Choose an answer
Base and collector
Base and emitter
Collector and emitter
None of the terminals
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Question # 10
When an arrow is shot from a bow, it has K.E. which is given to it by
Choose an answer
The elongated tail
The stretched string of bow
The throw of archer
The sharp arrows head
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Question # 11
House hold circuits are mostly
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Wired in sires
Wired in parallel
Made using wires of gold
Made using wires of silver
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Question # 12
The value of critical angle of glass is
Choose an answer
45
o
42
o
48
o
52
o
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Question # 13
The phenomenon of natural radioactivity was discovered by
Choose an answer
Lord Rutherford
James Chadwick
Herie Becquerel
Maria curie
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Question # 14
The free electron theory explains conduction in
Choose an answer
Insulators only
Metals only
Semi conductor only
Non metals only
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Question # 15
A heat engine with 100% efficiency would have to.
Choose an answer
Do no work
Be at uniform temperature
Use no heat
Discharge of 0
o
C
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Question # 16
When the temperature of source and sink of a heat engine become equal the entropy change will be.
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Zero
Maximum
Minimum
Negative
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Question # 17
On which factor mutual induction of two coils does not depends upon.
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Number of turns of the coils
Area of cross section of the coils
Closeness of the coils
Shape of the coils
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Question # 18
Thermodynamics concern its primary with the
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Measurement of quantity of heat
Physical effects of temperature changes
Conversion of heat into other energy forms
Behavior of gases
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Question # 19
When 5 C of charge flows through a particular resistor 10 J of energy is converted What is the p.d. across the resistor.
Choose an answer
0.5 V
2.0 V
15 V
50 V
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Question # 20
A convention current is the movement of fluid caused by the change in.
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Pressure
Temperature
Densities
Volume
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Question # 21
Who identified the first series in the spectrum of hydrogen.
Choose an answer
Lyman
Balmer
Pfund
Brackett
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Question # 22
Which one of the following is not a measure of electric power.
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Vi
I2R
VR2
V2/R
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Question # 23
Which is the heat transfer mode between an object and its environment due to circular fluid motion.
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Conduction
Convection
Radiation
Mass transfer
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Question # 24
Which effect produce ultrasonic is quartz.
Choose an answer
Pyroelectric effect
Piezoelectric effect
Hall effect
Magnetostriction effect
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Question # 25
Alternating current generator consists of a coil and a pair of.
Choose an answer
Split rings
Slip rings
Metal rings
Copper rings
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Question # 26
Two lenses of focal length 'f' are combined the resultant focal length is
Choose an answer
f
2f
f/2
zero
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Question # 27
Who was the first to suggest the existence of a positively charged nucleus in an atom.
Choose an answer
J.J Thomson
R.A Millikan
E.Rutherford
Neil Bohr
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Question # 28
The electrons behave as wave because.
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They can be diffracted by a crystal
They can be defecting by magnetic field
They can be deflecting by electric field
they can produce ions in gases
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Question # 29
The normal Human body temperature in Fahrenheit scale is.
Choose an answer
32
o
F
40
o
F
98.4
o
F
212
o
F
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Question # 30
One gray is equal to.
Choose an answer
1 J-1 kg -1
1 J -1 kg -2
1 J 1 -g-1
1 j kg -2
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Question # 31
The photons emitted in inner shell transition are.
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Alpha particle
Beta particle
Gama particle
Characteristic X-rays
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