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Physics General Science Test Hard Mode MCQs With Answers
Question # 1
When sound waves travel from air to water which of these remains constant?
Choose an answer
Velocity
Frequency
Wavelength
All the above
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Question # 2
Which of the following four statements is false?
Choose an answer
A body can have zero velocity and still be accelerated
A body can have a constant velocity and still have a varying speed
A body can have a constant speed and still have a varying velocity
The direction of the velocity of a acceleration is constant
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Question # 3
The nuclear model of atom was proposed by
Choose an answer
J.J Thomson
E.Rutherford
Neil Bohr
Summerfield
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Question # 4
Two point charge +3μC and +8μC repel each other with a force of 40 N. if a charge of -5μC is added to each of them then the force between will become
Choose an answer
-10N
+10N
+20N
-20N
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Question # 5
Angular momentum is
Choose an answer
Vector (axial)
Vector (polar)
Scalar
None of these
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Question # 6
To explain his theory Bohr used
Choose an answer
Conservation of linear momentum
Conservation of angular momentum
Conservation of quantum frequency
Conservation of energy
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Question # 7
A 2 kg body and a 3 kg body have equal momentum if the kinetic energy of 3 kg body is 10 j, the KE of 2 kg body will be
Choose an answer
6.66 j
15 j
22.5 j
45 j
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Question # 8
Choose the correct statement
Choose an answer
Both an ammeter and voltmeter should have small resistance
Both an ammeter and a voltmeter should have large resistance
An ammeter should have large resistance and a voltmeter should have small resistance
An ammeter should have small resistance and a voltmeter should have large resistance
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Question # 9
A person standing near the track of a fast moving train has tendency to fall towards it because of
Choose an answer
Vibration due to motion of train
Gravitation force of attraction between person and trains
The high speed of train
Some other effect
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Question # 10
A sun rise or sun set, the sun looks reddish because.
Choose an answer
The sun is coldest at these times
Of the effects of reflection and refraction
The sun is hottest at these times
Of the scattering of light
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Question # 11
Two masses of 1 g and 4 g are moving with equal kinetic energies The ratio of the magnitudes of their linear moments is:
Choose an answer
4 : 1
√2 : 1
1 : 2
1 : 16
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Question # 12
A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if
Choose an answer
The mass of the pendulum is increased
The mass of the pendulum is decreased
The length of the pendulum is increased
The length of the pendulum is decreased
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Question # 13
Radio waves of constant amplitude can be generated with
Choose an answer
Rectifier
Filter
FET
oscillator
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Question # 14
To make the frequency double of an oscillator, we have to
Choose an answer
Double the mass
Half the mass
Quadruple the mass
Reduce the mass to one fourth
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Question # 15
A piece of fuse wire melts when a current of 15 ampere flows through it.
With this current, if it dissipates 22.5 W, the resistance of fuse wire will be
Choose an answer
Zero
10 ohm
1 ohm
0.10 ohm
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Question # 16
The part of a transistor which is heavily doped to produce large number of majority carriers is
Choose an answer
Emitter
Base
Collector
Any of the above depending on nature of transistor
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Question # 17
When the length of a microscope tube increase, its magnifying power
Choose an answer
Decreases
Increases
Does not Change
May increase or decrease depending on the observer and the place of observation
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Question # 18
Which one of the following phenomena is not explained by Huygen's construction of wavefront?
Choose an answer
Refraction
Reflection
Diffraction
Origin of spectra
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Question # 19
Blood has a density
Choose an answer
Equal to water
Greater then water
Lesser then water
None of these
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Question # 20
A capacitor acts as an infinite resistance for
Choose an answer
AC
DC
Both AC and DC
Neither AC nor DC
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Question # 21
In a voltmeter the conduction takes place due to
Choose an answer
Electrons only
Holes only
Electrons and holes
Electrons and ions
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Question # 22
The essential distinction between X-rays and
γ-rays is that
Choose an answer
γ-rays have smaller wavelength than X-rays
γ-rays emanate from nucleus while X-rays emanate from outer part of the atom
γ-rays have greater ionizing power than X-rays
γ-rays are more penetrating than X-rays
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