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PPSC Physics Full Book MCQs With Answers
Question # 1
On the ground the gravitational force on a satellite is W What is the gravitational force on the satellite when at height R/50
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0.96 W
0.98 W
1.04 W
1.02 W
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Question # 2
The presence of a magnetic field can be detected by a
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Small mass
Stationary positive charge
Stationary negative charge
Magnetic compass
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Question # 3
If the period of a wave motion is 2 s and the wave speed is 4 cm s-1 then its frequency is
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1/8 C s-1
1/2 C s-1
2 C s-1
8 C s-1
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Question # 4
Which is the light sensitive tissue in human eye
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Retina
pupil
Iris
Cornea
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Question # 5
The energy in electron volts necessary to remove the most loosely bound electron from the neutral atom is known as.
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Faraday energy
Wave number
Ionization Potential
Excitation potential
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Question # 6
A ball mass 0.25 kg is thrown to a height of 20 m The change in G.P.E is
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49 J
50 J
-75 J
500 J
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Question # 7
The image of an object 5 mm high is only 1 cm high. The magnification of the lens is
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0.2
0.5
1
2
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Question # 8
Which magnetic properties is inherent in all materials.
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Para magnetism
diamagnetism
Ferromagnetism
demagnetism
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Question # 9
Radioactivity is the phenomenon associated with the.
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Transition of radiowaves
production of alpha particles only
Decay of nucleus
Reception of radio waves
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Question # 10
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 # 11
What happens to internal energy of a piece of lead when hammered.
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Increases
Decreases
Remains unchanged
Becomes zero
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Question # 12
The band of colours is called.
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Spectrum
Prism
Medley
LASER
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Question # 13
A 4 kJ mass of copper of specific heat capacity of 400 J kg-1k-1 is heated for 160 s by a heater of power 200 W what is the rise in temperature.
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10 K
16 K
100 K
160 K
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Question # 14
Heat Carnot be transferred from a colder to a hotter region unless work is done This is the statement of.
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Firs law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics
Zeroth law of thermodynamcis
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Question # 15
What type of process is the Carnot's cycle.
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Reversible
Irreversible
Neither reversible nor irreversible
May be reversible or irreversible
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Question # 16
The working principal of a photograph enlarger is basically the same as that of a.
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Camera
Side projection
Microsopce
Telecopse
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Question # 17
A pendulum vibrates with a time period of 1 s which range of sound is produced by it
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Audible
Infrasonic
Ultrasonci
Super sonic
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Question # 18
The nib of fountain pan is split of convey ink down the nib by the phenomenon of.
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Adhesion
Cohesion
Osmosis
Capillary
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Question # 19
If emf of the battery in a thermocouple is doubled, what is the rate of heat generation at one function.
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Remains unchanged
Becomes half
Become double
Becomes 4 times
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Question # 20
One volt is equal to.
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One joule per coulomb
One dyne per coulomb
One newton per coulomb
One watt second
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Question # 21
The scalar product of two vectors in negative when
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Vectors are parallel
Vectors are antiparallel
Vectors and perpendicular
Vectors are parallel with same magnitude
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Question # 22
Which one is the primary standard for temperature measurement.
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Resistance thermometer
Mercury in glass thermometer
Constant volume gas thermometer
Pyrometer
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Question # 23
A tank 3 m long 1 m wide and 0.5 m deep is filled with oil which weight 12,000 N . The pressure on the base of the tank due to oil is.
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1,000 Pa
4,000 Pa
3,000 Pa
6,000 Pa
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Question # 24
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 # 25
Radioactive substances do not emit
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Alpha particles
Beta particles
Gama rays
Neutrons
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Question # 26
Thermodynamics concern its primary with the
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Measurement of quantity of heat
Physical effects of temperature changes
Conversion of heat into other energy forms
Behavior of gases
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Question # 27
On which temperature scale a degree is 1/180 of the interval between the freezing point and the boiling point.
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Celsius scale
Fahrenheit scales
Rankine scale
Kelvin scale
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Question # 28
For which of the following objects is the centre of mass equidistant from every point on its surface
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An unsharpened pencil
A gramophone record
An egg
A table tennis ball
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Question # 29
Which liquid can flow easily.
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Traacle
Pitch
Ether
All flow with same rate
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Question # 30
Which one of the following telescopes has the least length when set for parallel rays.
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Astronomical telescope
Galileo's telescope
Terrestrial telescope
Reflecting telescope
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Question # 31
The energy that must be added to separate the nucleus is called.
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Critical energy
Binding energy
Gravitational energy
Electrostatic energy
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