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PPSC Physics Full Book MCQs With Answers
Question # 1
A wire of 5 m length carries a steady current if the field inside it is 0.2 v m-1 then the potential difference will be.
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0.1 V
0.5 V
1 V
5 V
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Question # 2
Longitudinal waves cannot be
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Reflected
Difracted
Dispersed
Polarized
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Question # 3
Why choke coil is used in an AC circuit.
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To decrease D.C.
To increases A.C.
To decreases A.C
To increase D.C
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Question # 4
A wire surrounded by a concentric cylindrical metal shield constitutes a.
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Spherical capacitor
Parallel plate capacitor
Cylindrical capacitor
Cylindrical condenser
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Question # 5
The pitch of sound a determined by its
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Speed
Frequency
Direction
Number of beats
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Question # 6
Which particle interact via all fundamental forces.
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Leptons
Hadrons
Muons
mesons
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Question # 7
The particles less in mass than protons are
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Measons
Bosons
Baryons
Nucleons
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Question # 8
If a planet of mass double than that of the earth and radius three times greater than the earth a 10 kg mass on its surface will weight.
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2.2 N
4.4 N
6.7 N
13.2 N
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Question # 9
A pure choke consumes
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No power
Maximum power
Minimum power
Average power
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Question # 10
A device consisting two different conductors that produce a voltage proportional to the temperature difference between either end of the pair of conductors is a.
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Thermistor
Thermocouple
Strain gauge
Potentiometer
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Question # 11
The ability of eye to focus near as well as distant object is termed as.
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Myopia
Persistence of vision
Power of accommodation
Astigmatism
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Question # 12
When objects placed in a room are exposed to X- rays they appear
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Violet
Visible
Red
Invisible
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Question # 13
An inflated tyre suddenly bursts As a result of this temperature of the surrounding
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Increases
Descreases
Remains constant
May increase or decrease
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Question # 14
With increase in temperature the angle of contact of liquid.
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Increases
Decreases
Becomes zero
First increase then decreases
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Question # 15
The coulomb's law is valid for the charges which are.
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Moving and point charges
Moving and non point charges
Stationary and point charges
Stationary and large size charges
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Question # 16
The magnitude of the resultant of two forces may be increased by
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Increasing the angle between them
Decreasing the angle between them
Drawing the parallelogram to represent them
Drawing the force perpendicularly
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Question # 17
From which radiation it is most difficult to protect oneslelf.
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Alpha radiation
Beta radiation
Gama radiation
Heat radiation
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Question # 18
When a direct current is passed though a junction formed of two dissimilar metals the junction becomes warmer or cooler depending on the.
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Current direction
Thermocouple used
Temperature gradient
Amount of current
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Question # 19
Which of the following is more viscous
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Air
Honey
Water
Milk
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Question # 20
Wave motion in air consist of
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Longitudinal waves
Transverse waves
Seismic waves
Polarized waves
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Question # 21
The best shield against Gama rays would be of
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Heavy water
Aluminium
Iron
Lead
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Question # 22
Which of the following is the magnitude of the gravitational force and is not the inherent property of the body.
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Mass
Weight
Speed
Length
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Question # 23
The pressure of a goas is directly proportion to
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Mean velocity of the molecules
Mean square velocity of the molecules
Root mean square velocity of the molecules
Instantaneous velocity of the molecules
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Question # 24
Why transistor is preferred to triode valve for use as an amplifier.
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Because it can handle large power
Because it has higher input impedance
Because it has higher voltage gain
Because it has lower voltage gain
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Question # 25
Who designed the atomic reactor.
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Wilson
Rutherford
Teller
Fermi
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Question # 26
Which of the substances is the lightest one.
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Copper
Mercury
Aluminium
Lead
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Question # 27
Which of the following phenomenon gives evidence of the molecular structure of mater
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Evaporation
Diffusion
Brownian movement
All of the above
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Question # 28
The temperature which is the same in
o
C and
o
F is.
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-20
-40
20
40
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Question # 29
Radio carbon in the atmosphere is produced by the bombardment of.
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Oxygen by high energy neutrons
Oxygen by high energy protons
Nitrogen by high energy protons
Nitrogen by high energy neutrons
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Question # 30
a 5 kg mass is falling freely the force acting on it will be.
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0 N
9.8 N
5 N
19.6 N
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