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PPSC Physics Full Book MCQs With Answers
Question # 1
An important property of an ideal power supply is.
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Infinite internal resistance
Zero internal resistance
Large output resistance
Small output resistance
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Question # 2
Which given element has lowest work function
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Na
Al
si
C
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Question # 3
For an electron or position the rest mass energy is equal to.
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0.21 MeV
0.51 MeV
1.51 MeV
1.21 MeV
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Question # 4
Which of the following quantity is zero about the centre of mass of baody.
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Mass
Acceleration
Moment
Angular momentum
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Question # 5
The ratio of the rms value of the applied voltage to the rms value of resulting A.C. is called.
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Reluctance
Impedance
Reactance
Resistance
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Question # 6
The particles equal in mass or greater than protons are called.
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Mesons
Bosons
Baryons
Nucleons
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Question # 7
When 5 C of charge flows through a particular resistor 10 J of energy is converted What is the p.d. across the resistor.
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0.5 V
2.0 V
15 V
50 V
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Question # 8
Which of the following is an electrical insulator that can be polarized by an applied electric field.
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Conductor
Condenser
Di electric
Capacitor
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Question # 9
Which type of microscope was the first to be developed.
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Optical microscope
Digital microscope
Electron microscope
All were developed at the same time
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Question # 10
Mean free path of gas molecules is inversely proportional to its
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Volume
Pressure
Temperature
Size
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Question # 11
A type of resistor whose resistance varies significantly with temperature is.
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Thermistor
Thermocouple
Strain gauge
Potentiometer
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Question # 12
A diver leaving the diving board makes a somer sault in the air.
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This is due to gravitational force
The moment of inertia is decreased during the turn
His moment of inertia is increased
He pushes at the air for making the true
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Question # 13
The maximum energy of emitted photoelectron is measured by
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the largest potential difference they can traverse
The current they produce
The potential difference they produce
The speed with they emerge
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Question # 14
The cause of production of eddy current is the
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Current flowing in a conductor
Current flowing in a insulator
Motion of a conductor in a varying magnetic field
Motion of an insulator in a varying magnetic field
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Question # 15
What happens to a soap bubble, when some charge is given to it.
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It collapses
It increases in size
It decreases in size
It feels nothing
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Question # 16
Which of the following is invariant under Galilean transformation.
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Velocity
Impulse
Momentum
Distance
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Question # 17
The process of pair production will take place if the energy of photon is greater than.
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0.21 MeV
0.51 MeV
1.51 MeV
1.21 MeV
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Question # 18
Which one of the following pairs does not have the same dimensions.
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Force and weigfht
Pressure and stress
Capacitance and resistance
Energy and work
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Question # 19
The induced current in a circuit can be increased by
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Using a strong magnetic field
Moving the loop faster
Replacing the loop by a coil of many turns
All of the above
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Question # 20
The process where by energy is dissipated from the oscillating system is called.
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Resonance
Damping
Forced oscillation
Free oscillation
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Question # 21
The discovery of interference of light was made possible in.
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1801
1901
1825
1925
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Question # 22
Two waves of the same frequency and amplitude travelling in opposites directions along the same path in the same medium produce.
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Stationary waves
Transverse wave
Longitudinal waves
Compressional waves
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Question # 23
The basic quantity used to describe the state of magnetization of a substance is the
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Magnetic strength
Magnetic susceptibility
Magnetic moment
Magnetic moment per unit volume
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Question # 24
In vacuum all electromagnetic waves have the same.
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Frequency
Amplitude
Speed
Wavelength
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Question # 25
A bat while flying determines the location and nature of object in his way by sending.
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Infrasonic waves
Ultrasonic waves
Supersonic waves
Ultraviolet waves
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Question # 26
The corss product of two vectors is zero when they
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Are parallel to each other
Are perpendicular to each other
Are at an angle of 120
o
Both are equal
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Question # 27
What are isotopes.
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Atoms of the same element with different numbers of neutrons.
Atoms of the same element with different numbers of protons.
Atoms which are radioactive
Atoms which have gained or lost an electron
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Question # 28
If two gases have same reduced pressure volume and temperature it is according to
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Boyle's law
Charles law
Law of corresponding state
Zeroth law
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Question # 29
The image of distant object as seen through as astronomical telescope is.
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Real and inverted
Virtual and inverted
Real and erect
Virtual and erect
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Question # 30
When a ray of light enters a glass slab from air
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Its frequency increases
Its wavelength increases
Neither frequency nor wavelength change
Its wavelength decreases
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Question # 31
The critical angle will be maximum when light travels from
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Glass of air
Water to air
Water to glass
Glass to water
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