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PPSC Physics Full Book MCQs With Answers
Question # 1
The thermal inertia of a thermodynamic system is known as its.
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Entropy
Enthalpy
Isothermal conduction
Adiabatic conduction
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Question # 2
Both xenon and cesium each have
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24 isotopes
28 isotopes
32 isotopes
36 isotopes
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Question # 3
When the deforming force applied on a body produces change in volume then it is said to be
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Tensile stress
Compression stress
Shear stress
Shear modulus
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Question # 4
Which one the following is not a component of a Bipolar junction Transistor
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Base
Emitter
Collector
Grid
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Question # 5
If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.
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1 m
10 m
20 m
100 m
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Question # 6
Which of the following is invariant under Galilean transformation.
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Velocity
Impulse
Momentum
Distance
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Question # 7
Linear acceleration of a point moving in a circle of radius 30 cm with angular acceleration of 0.5 rad s-2 is
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1.5 cm s-2
2.5 cm s-2
10 cm s-1
15 cm s-2
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Question # 8
Particle which can be added to the nucleus of an atom with changing its chemical properties are called.
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Electrons
Protons
Neutrons
Alpha particles
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Question # 9
A magnetic pole
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Is made of a magnetic material
Is a factious quantity
Is defined in terms of Ampere's law
Cannot be detected
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Question # 10
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 # 11
In which device is a permanent magnet used
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An electric bell
An electromagnet
A plotting compass
A relay
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Question # 12
Which quantity is not affected by a magnetic field.
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Moving charge
Stationary charge
Current flowing in a conductor
Charge in magnetic flux
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Question # 13
Waves transfer
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Frequency
Velocity
Energy
Wavelength
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Question # 14
What is the internal energy of a mono atomic ideal gas.
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Potential only
Parity kinetic and parity potential
Kinetic only
Neither kinetic nor potential
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Question # 15
In a projectile motion, the horizontal range depends upon.
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Initial velocity
Velocity at the highest position
angel of projection
Vertical component of velocity
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Question # 16
Which of the following in the best container for gas during adiabatic process.
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Copper vessel
Thermos flask
Glass container
Wooden container
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Question # 17
The value of electric field intensity is.
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Volt
Coulomb
Newton
Newton coulomb
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Question # 18
If in Young's double slit experiments the separation between two slits is halved then the fringe width
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Remains unchanged
Becomes double
Reduces to half
Becomes 3 times
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Question # 19
In order to har an echo what is the minimum distance between the sound and reflecting surface.
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0.65 m
16.5 m
1.65 m
165 m
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Question # 20
Which of the following is the ideal gas equation.
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PV -n RT
P/V = n RT
V/P = nR/T
PV = T/nR
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Question # 21
Any substance that can flow is a
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Solid
Gas only
liquid only
Fluid
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Question # 22
An instrument which can float in the liquid to be tested and by means of which the specific gravity of the liquid may be determined is.
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Hydrometer
Barometer
Siphon
Lactometer
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Question # 23
A Galilean telescope with objective of coal length 30 cm and eyepiece of focal length.8 cm when focused for infinity has length equal to
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7.5 cm
2.2 cm
38 cm
240 cm
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Question # 24
Light wave can be polarized because they
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Are transverse in nature
Can be reflected
Have short wavelength
Have high frequncies
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Question # 25
Self inductances of solenoid is
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Directly proportional to the current flowing through the wire
Directly proportional to its length
Inversely proportional to area of corss section
Directly proportional to number of turns
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Question # 26
A heat engine can develop efficiency equal to 100% if the temperature of the sink is
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Less than that of source
Equal to that of source
0 K
0
o
C
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Question # 27
The lowest stress at which strain increases in stress in called.
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elastic limit
Plastic limit
Yield point
Bulk strength
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Question # 28
The amplitude of a vibrating body placed in a resistive medium.
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Increases exponentially with time
Decreases exponentially with time
Remains constant with time
Cannot be observed
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Question # 29
Most cooking involves
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Adiabatic process
Isothermal process
Isobaric process
Isochoric process
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Question # 30
Beats are the result of.
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Interference
Doppler's effect
Ultrasound
Polarization
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Question # 31
The path of electron in Rutherford atomic model according to classical theory a.
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Parabolic
Straight line
Spiral
Circular
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