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Physics General Science Test Medium Mode MCQs With Answers
Question # 1
The most suitable material for permanent magnet is
Choose an answer
cobalt
iron
steel
alaminium
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Question # 2
The r.m.s. value of alternating current is equal to its maximum value at angle of
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60
°
45
°
30
°
90
°
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Question # 3
Glass is an example of
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crystalline solid
amorphous solid
polymeric solid
none of them
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Question # 4
Blomass includes:
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Crop residue
Natural vegetation
Animal dung
All of these
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Question # 5
The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be
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1 : 2
4 : 1
1 : 4
2 : 1
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Question # 6
If a liquid is heated in weightlessness, the heat is transmitted through
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Conduction
Convection
Radiation
Neither, because the liquid cannot be heated in weightlessness
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Question # 7
A car is turning around a corner at 10 m/sec as it travels along an arc of circle. If value of centripetal acceleration is 10 m/sec
2
in this case, find radius of the circular path:
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1 m
5 m
10 m
15 m
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Question # 8
When a silicon crystal is doped with a pentavalent element, such an extrinsic semi-conductor is called
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p-type semi-conductor
n-type semi-conductor
either of them
none of them
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Question # 9
The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of
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2 cm/s
20 cm/s
200 cm/s
2000 cm/s
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Question # 10
When a constant potential difference is applied across the conductor, the drift velocity of electrons:
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Increases
Decreases
Remains the constant
Either of these
None of these
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Question # 11
In photoelectric effect the energy of ejected electrons depend on
Choose an answer
The frequency
The intensity
Both frequency and intensity
None of these
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Question # 12
Graham Bell photo phone used a modulated beam of
Choose an answer
Reflected sun light
Refracted sun light
Diffracted sun light
None of these
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Question # 13
According to Young s experiment the distance between two adjacent bright fringes of blue light is _____ than for oranges light
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Less
Maximum
Equal
May be less may be greater depending upon slit spacing
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Question # 14
Can a vector have a component greater than the vectors magnitude ?
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yes
No
yes in some cases
None of these
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Question # 15
Acceleration produced in a body by a force varies
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inversely as the applied force
directly as the mass of the object
directly as the mass of the body
none of them
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Question # 16
We can use Fibre optics system for
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Image transmitting
Word processing
Image processing and recelving
All
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Question # 17
In Multimode step index fibre the refractive index from its centre to the boundary is
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1
1.55
1.52
1.43
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Question # 18
If Rx is positive and Ry is negative, the resultant lies the fourth quadrant and its direction is
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θ = 180 + Φ
θ = 360 + Φ
θ = 360 - Φ
None of these
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Question # 19
A hole in a semi-conductor material is treated as
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positive charge
negative charge
neutral
none of them
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Question # 20
Which one the following gives three regions of electromagnetic sepctrum in order of increasing wavelength?
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Gamma rays, micro waves, visible light
Radio waves, ultraviolet waves, X-rays
Ultraviolet rays, Infrared rays, micro waves
Visible light, gamma rays, radio waves
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Question # 21
A usual way to obtain a plane wave is to place point source of light at the focus of a
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concave lens
convex lens
both of them
either of them
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Question # 22
The force applied on unit area to produce any change in the shape, volume or length of a body is known as
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strain
elasticity
stretching
stress
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