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PPSC Physics Full Book MCQs With Answers
Question # 1
When Photon incident on a metal produce the emission of electrons the process is called.
Choose an answer
Photo electric effect
Pair production
x-rays production
Gama ray production
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Question # 2
Oscillatory motion is always under
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An applied force
Restoring force and inertia
A periodic force
A gravitational force
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Question # 3
The angle of incidence that causes the refracted ray in the rarer medium to bend though 90
o
is called.
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Critical angle
solid angle
Plane angle
Acute angle
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Question # 4
Shadow formation and the pin hole camera illustrate the
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Phenomenon of reflection
Phenomenon of refraction
Phenomenon of total internal reflection
Rectilinear propagation of light
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Question # 5
Special theory of relativity deals with the events in the frames of reference which move with constant.
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Time interval
Acceleration
Momentum
space interval
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Question # 6
According to Huygen's principle
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Light bends round corners
Light travels in a straight line
All points on primary wave front are considered centre of distances
Light has wave nature
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Question # 7
Surface tension of a liquid may be defined as
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Heat energy per unit area
P.E. per unit area
surface energy per unit area
K.E. per unit area
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Question # 8
In case of a convex lens, image formed at 2 F is
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Virtual, erect and larger than the object
Real, inverted and large than the object
Real, inverted and same size as the object
Real, inverted and smaller than the object
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Question # 9
Which magnetic properties is inherent in all materials.
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Para magnetism
diamagnetism
Ferromagnetism
demagnetism
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Question # 10
The SI unit of absorbed dose in.
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Bel
Weber
Rem
Grey
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Question # 11
Electrostatic force as compared to gravitational force is
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Zero
infinite
Very weak
Very strong
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Question # 12
Faraday's law deals with
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Induced emf
Motional emf
Induced current
Electric current
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Question # 13
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 # 14
Which equation in electromagnetism describe the magnetic field B generated by an electric current.
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ampere's circuital law
Bio savart law
Gauss's law for electromagnetism
Coulomb's law
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Question # 15
Which is the branch of medicine that deals with the anatomy physiology and diseases of the eye.
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Ophthalmology
Psychology
Andrology
Gynecology
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Question # 16
What happens to Carnot efficiency if the source temperature increases.
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Decreases
Increases
Remain the same
Becomes zero
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Question # 17
A bomb dropped from an aeroplane explodes in air, its total.
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Momentum decreases
Momentum increases
K.E. Increases
K.E. Decreases
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Question # 18
The highest efficiency of a heat engine whose low temperature is 17 oC and the high temperature of 200 oC is.
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20%
30%
35%
40%
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Question # 19
The conductivity of a conductor is independent of the
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Electric charge
Electric potential
Electric field
Internal resistance
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Question # 20
Atomic reactor is based on
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Controlled chain reaction
Uncontrolledly chain reaction
Nuclear fission
Nuclear fusion
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Question # 21
The light rays which combine destructively would mean that resultant
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Intensity increases
Intensity decreases
Amplitude increases
Amplitude decreases
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Question # 22
What kind of movement is dictated by the laws of thermodynamcis.
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Energy motion
Heat work
Light heat
Energy light
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Question # 23
The volume of a goas at constant pressure is directly proportional to the temperature as measured on the.
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Celsius scale
Kelvin scale
Fahrenheit scale
Baume scale
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Question # 24
The amplitude of a vibrating body at resonance place in vacuum is.
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zero
Maximum
Minimum
Infinite
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Question # 25
The free electron theory explains conduction in
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Insulators only
Metals only
Semi conductor only
Non metals only
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Question # 26
Two pure inductors each of self inductance L are connected in parallel The total inductance of the combination is.
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L
2L
L/2
L/4
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Question # 27
If we make the magnetic field stronger the value of induced emf is.
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Decreased
Increased
Vanished
Kept constant
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Question # 28
Which of the following form of electromagnetic energy has the highest frequency.
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X rays
Game rays
Ultraviolet waves
Infrared waves
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Question # 29
A resistor whose resistance decreases with increasing intensity is.
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Light dependent resistor
Thermistor
Thermocouple
Strain gauge
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Question # 30
One of the device to produce plane polarized light is.
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A prism
A bi prism
A plane mirror
A nicol prism
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Question # 31
Which following properties of molecules of a gas is same for all gases at a particular temperature.
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Momentum
Mass
velocity
K.E.
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