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Physics General Science Test Medium Mode MCQs With Answers
Question # 1
Two sound waves of slightly different frequencies propagating in the same direction produce beats due to
Choose an answer
Interference
Diffraction
Polarization
Refraction
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Question # 2
Electrons of an isolated atom are bound to the nucleus, and
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can only have distinct energy level
can only have same energy level
may or may not have distinct energy levels
none of these
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Question # 3
Bodies which falls freely under gravity provides good example of motion under:
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Uniform acceleration
Non-uniform acceleration
Uniform velocity
None of these
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Question # 4
A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m
3
during its steady flow
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1.3 m/s
1.6 m/s
1.9 m/s
2.2 m/s
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Question # 5
A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:
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38 m/sec
3.8 m/sec
0.6 m/sec
None of these
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Question # 6
The conduction band in a solid
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may be empty
cannot be empty
should be filed
all of them
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Question # 7
Tick the one which is not a crystalline solid:
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Zirconia
Glass
Copper
Ceramic solid
An ionic compound
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Question # 8
Selenium is:
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An insulator
A conductor
Both A and B
Excellent conductor
None of these
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Question # 9
Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
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400 m/sec
40 m/sec
430 m/sec
300 m/sec
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Question # 10
Acceleration in a body is always produced in the directin of:
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Velocity
Weight
Force
Botha B and C
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Question # 11
The curie temperature of iron is about
Choose an answer
250
°C
500
°C
750
°C
1000
°C
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Question # 12
The flow is said to be streamline or laminar when very particle
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Moves in different direction
Moves along the same path as
Slowly moves in one direction
None of these
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Question # 13
The setting of Newton's rings is
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A Plano convex lens and the plane glass plate
A Plano convex lens and simple glass sheet
A Plano convex lens (long focal length) and the plane of glass plate
None of these
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Question # 14
A bomb of mass 9 kg explodes into two pieces of mass 3 kg and 6 kg.The velocity of mass 3 kg is16 ms
-1
,K.E of mass 6 kg is
Choose an answer
96 j
192 j
384 j
768 j
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Question # 15
The unit of torr or mm of Hg is opted instead of SI unit of pressure because
Choose an answer
Measurement is easy
Swift calculations
Extensive use in medical equipments
None of these
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Question # 16
The energy required to charge a capacitor of 5 μF by connecting D.C source of 20 kV is
Choose an answer
10 kJ
5 kJ
2 KJ
1 kJ
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Question # 17
A pulse of light in the optical fibres represents the number
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0
1
2
3
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Question # 18
In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :
Choose an answer
140days
45days
87days
90days
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Question # 19
The value of young's modulus is maximum for:
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Dimond
Copper
Ice
Mercury
Water
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Question # 20
Which of the fluid has ideal behavior at low speeds
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Air
Blood
Honey
None of these
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Question # 21
Nicrom wire is an example of
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Non ohmic device
Ohmic device
Neutral device
Charged device
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Question # 22
Newton's second law of motion is also called
Choose an answer
Law of inertia
Law of acceleration
Law of force
None of these
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