Which of the following is not a derived quantity ?
Velocity
Temperature
Acceleration
Pressure
4) How many images are produced,if a object is kept on bisector of two plane mirrors inclined at 45°.....
7
8
9
6
5) The ratio of speed of light in vacuum to that in the given medium is called...
Relative refractive index.
Refraction
Absolute refractive index
Reflection
6) The depth of pond is 10 m . What is the Apparent depth for a person looking normally to the water surface ? (n for water is 4/3).
75 m
7.5 cm
0.75 m
7.5 m
7) Optical fibre is based on Which of the following phenomenon ?
Reflection
Refraction
Total internal reflection
Dispersion
8) A stick or pencil kept obliquely in a glass containing water appears broken as its part in water appears to be raised . due to..............
Refraction
Reflection
Total internal reflection
Dispersion
9) For the phenomenon of Total internal reflection,Which of the following statement is true......
A) Light must be travel from denser medium to rarer medium.
B) Angle of incidence in denser medium great than critical angle for the given pair of media.
Both A & B
Only A
10) For any material medium ( Other than vacuum ) refractive index is always.......
n < 1
n = 1
n = 0
n > 1
11) For plane reflecting mirror, which statement is wrong.....
Image is of the same size as that of object.
Image at the same distance as that of object
Image is real and magnified
Image is virtual and laterally inverted
12) The medium in which light travels slower , is.............
Vacuum
Optically denser
Optically rarer
None of these
13) In total internal reflection, When the angle of incidence is equal to the critical angle for the pair of media in contact, What will be the angle of refraction ?
Equal to the angle of incidence
90°
180°
0°
14) If two plane mirrors are inclined at an angle 80° & position of object is anywhere then the number of images are produced..,...
4
3
5
4.5
15) For a person seeing an object placed in optically rarer medium..........
Apparent depth of the object is more than real depth
Apparent depth is smaller than real depth
Apparent depth might be smaller or greater depending on the position of the person.
Nothing can be concluded about the depth of object from given data.
16) Which of the following is the fundamental unit ?
Length , Force , Time
Length , Mass , Time
Mass , Volume , Height
Mass , Velocity , Pressure
17) The SI unit of solid angle is.....
radian
steradian
candela
mole
18) Which of the following is not a unit of time ?
per second
Nano second
Micro second
Hour
19) The physical quantities which depend on one or more fundamental quantities for their measurements are called.........
Fundamental quantities
System of unit
Derived quantities
SI unit
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