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PPSC Physics Full Book MCQs With Answers
Question # 1
On what factor the internal energy of a thermodynamic system depend upon.
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History
State
Process
Surroundings
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Question # 2
A negative magnification always means the the image is.
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Erect
Real
Virtual
Inverted
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Question # 3
The term radius of gyration relates to.
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Moment of force
Moment of inertia
Law of gravitation
simple harmonic motion
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Question # 4
Who introduced the concept that an atom posses quantized energy levels.
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Raman
Bohr
Newton
Fermi
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Question # 5
The relation between work function and maximum energy of photo electrons was discovered by.
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Stefan
Marely
Einstein
Max. Planck
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Question # 6
The SI unit of density is.
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kg m2
kg m-2
kg m-3
kg m2 s-2
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Question # 7
A body of mass 2 kg attached to a spring is pulled to a distance of 4 cm What will be the value of spring constant K.
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490 N m-1
980 N m-1
1260 N m-1
1960- N m-1
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Question # 8
The first measurement of the force between electric charges was made in.
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1684
1784
1864
1874
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Question # 9
Which BJT configurations used for signal inversion.
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CE
CC
CB
BE
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Question # 10
The unit Planck's constant is equivalent to that of.
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Energy
Force
Velocity
Angular momentum
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Question # 11
Who proposed the thermodynamic scale of temperature.
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Saadi carnot
Lord Kelvin
Sir james dewar
Gabriei fahrenheit
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Question # 12
Which of the following gives discrete emission spectrum.
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Sun
Candle
Incandescent filament
Mercury vapour lamp
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Question # 13
When current in an inductor is increasing
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energy is lost
Energy is being stored in the magnetic field of the inductor
Energy is being drained from the magnetic field of the inductor
Eddy current is produced
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Question # 14
A charged particles moving in a magnetic field experiences a resultant force.
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Proportional to its K.E.
In the direction of the field
In the direction opposite to its motion
In the direction perpendicular to both the field and its motion
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Question # 15
What would be the colour of sky through hour the day .If the earth has no atmosphere.
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Blue
Red
White
Black
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Question # 16
Photo diodes are used as
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Optical fibre receivers
Automatic switching
Logic circuits
All of the above
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Question # 17
Inertial mass and gravitational mass are
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Opposite
Proportional
Weights
Inversely proportional
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Question # 18
In a Geiger Marsden experiment why do the great majority of the Alpha particles pass straight through the metal foil.
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Atomic nuclei may contain neutrons
Atoms are electrically neutral
Atoms are largely empty space
Atoms have positively charged nuclei
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Question # 19
A component of the spectrometer which consists of a fixed metallic tube with a coned lens at one end and an adjustable slit is called.
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Telescope
Collimator
Tumtable
Grating
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Question # 20
The normal adjustment the magnifying power of an astronomical telescope is.
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fe/fo
fo/fe
fo+ fe
fo -fe
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Question # 21
Object may acquire an excess or deficiency of charge by
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Rubbing them together
Grounding them
Applying coulomb's principle
Shielding them
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Question # 22
When a ray of light is incident perpendicularly to the boundary of two media.
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It pass through without bending
It is speed is faster int he optically denser medium
It derivates from its original path
It is totally reflected back
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Question # 23
Under which of the following conditions current in a circuit is wattles.
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When inductance in the circuit is zero
When resistance in the circuit is zero
When current is alternating
When resistance and inductance both are zero
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Question # 24
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 # 25
The absorption of X-rays in a given material follows.
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A parabola path
Is straight line
An exponential curve
A circle
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Question # 26
In scattering experiment which force scatters alpha particle.
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Nuclear force
Coulomb's force
Gravitational force
Centripetal force
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Question # 27
Which of the following is the most massive particle.
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Deuteron
Alpha particle
Neutron
positron
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Question # 28
On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.
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Target material
Accelerating voltage
Filament temperature
Separation between target and the filament
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Question # 29
In a parallel resonant circuit, at resonance
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Current is maximum
Voltage is maximum
Impedance is minimum
Impedance is zero
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Question # 30
A young man wearing glasses does not require bifocals because he
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Is farsighted
Has the ability to accommodate
Is short signed
Does not suffer from coma
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Question # 31
Base current of a transistor is 1 mA and collector current is 99 mA What is emitter current.
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1 mA
100 mA
98 mA
110 mA
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