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PPSC Physics Full Book MCQs With Answers
Question # 1
A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror What is the object distance.
Choose an answer
-5.0 cm
-7.5 cm
-15 cm
-20 cm
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Question # 2
When a tennis balls is hit by a racket inasmuch a way that it spins as well as moves forward the velocity of the air on one side of the ball
Choose an answer
Increases
Decreases
Remain constant
Become zero
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Question # 3
Who studied the change in velocity with the help of geometry for the first time.
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Nicole Oresme
Galileo
Alberuni
Ibn al haithem
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Question # 4
The critical mass of fissionable uranium -235 can be reduced by
Choose an answer
Adding impurities to it
Heating the material
surrounding it by neutron reflecting material
Surrounding it by neutron absorbing material
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Question # 5
The maximum number of rays required by a lens to form an image are
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2
3
4
Infinite
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Question # 6
Conductance is the reciprocal of
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Inductance
Capacitance
Resistance
Admittance
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Question # 7
Which one of the following materials has negative temperature coefficient.
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Conductors
Semiconductors
Insulators
Covalent bonds
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Question # 8
Two convex lenses of equal focal length 'f' are placed in contact, the resultant focal length is
Choose an answer
Zero
1
2f
f/2
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Question # 9
The susceptibility of a paramagnetic material is
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negative
Positive
Zero
Infinity
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Question # 10
A cube with sides 2 cm long is made from a material of density 8 g cm -3 What is the density of the block is.
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0.2 g cm-3
0.5 g cm-2
2 g cm-3
5 g cm-3
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Question # 11
Which of the following atom pair have the same structure.
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N, C
B, Li
H2 , Ne
Li , Na
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Question # 12
A monochromatic light beam when passed through a prism is.
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Diffracted
Devlated
Polarized
Dispersed
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Question # 13
The emission of electrons from a metal surface when exposed to light of suitable frequency is called.
Choose an answer
Pair production
Compton effect
Photo electric effect
Zeeman effect
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Question # 14
The pitch of sound a determined by its
Choose an answer
Speed
Frequency
Direction
Number of beats
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Question # 15
Michelson's interferometer was devised in.
Choose an answer
1801
1825
1867
1881
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Question # 16
The phenomenon in which a charging current in one coil induces an emf in another coil is called.
Choose an answer
Induced current
Induced emf
Self induction
Mutual induction
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Question # 17
On which characteristics the loudness of sound pends upon.
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Pitch
Speed
Wavelength
Amplitude
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Question # 18
Which characteristics successively increases in the musical scale.
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Pitch
Quality
Loudness
Amplitude
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Question # 19
Which given quantity remains the same in isotones.
Choose an answer
Mass number
Atomic number
Number of neutrons
Number of protons
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Question # 20
The energy that must be added to separate the nucleus is called.
Choose an answer
Critical energy
Binding energy
Gravitational energy
Electrostatic energy
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Question # 21
A double convex lens acts as diverging lens when the object is.
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Inside the focus
At the focus
Between F and 4 F
a 4F
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Question # 22
Which particle is removed by a photon.
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Quark
Electron
Proton
Neutron
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Question # 23
The value of voltage or current that exists in a circuit at any instant of time measured from some reference point is its.
Choose an answer
Peak value
Peak to peak value
Instantaneous value
Average value
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Question # 24
Which vector can be used to locate the centre of mass of a collection of particles.
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Null vector
Unit vector
Position vector
Distance vector
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Question # 25
The dot product of electric intensity and area of a surface is equal to.
Choose an answer
Magnetic flux
Electric flux
Motional emf
Induced emf
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Question # 26
Para magnetism is.
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A distrotion effect
An orientation effect
A skin effect
A resistance
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Question # 27
Who introduced the concept that an atom possesses quantized energy levels.
Choose an answer
Fermi
Newton
Bohr
Einstein
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Question # 28
Who was the first to suggest the existence of a positively charged nucleus in an atom.
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J.J Thomson
R.A Millikan
E.Rutherford
Neil Bohr
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Question # 29
A dry battery can deliver 3,000 J energy to a small 2 W electric motor before the battery is exhausted for how minutes does the motor run.
Choose an answer
20 minutes
25 minutes
75 minutes
125 minutes
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Question # 30
To obtain is parallel beam from the headlight of a car it must be fitted with.
Choose an answer
A convex mirror
A concave mirror
A convex lens
A concave lens
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Question # 31
When ever a system is made to complete a cyclic process the work done during the complete cycle.
Choose an answer
Is zero
Is negative
Is positive
Depends upon the path followed
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