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CBSE
Class 11 Physics
Units And Measurement Chapter 2
Quiz 1
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Random errors occur due to:
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fluctuations in temperature, supply,error in reading
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incorrect rounding off
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imperfect design of instruments
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parallax
In the formula where b is the arc length and D is the radius,θ is measured in:
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minutes
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degrees
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radians
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seconds
1 fermi is equal to:
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10-10 m
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1010 m
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1015 m
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10-15 m
Approximate ratio of 1 fermi to 1 angstrom is ..............
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10-5m correct
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10-15 m
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10-9 m
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10-6 m
The error in two readings of A are 0.01 and -0.03, then mean absolute error is ?
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0.002
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- 0.004
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0.02
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- 0.02
One angstrom is equal to __________ .
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10-9 m
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10-11 m
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10-12 m
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10-10 m
Angstrom is the unit of
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Time
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Mass
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Light
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Length
Which is the most accurate atomic clock?
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Carbon-12 clock
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Carbon atom clock
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Caesium atom clock
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Stop clock
The method used to measure the distance of a planet from the earth is
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Parallax method
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Archimedes' method
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Newton's method
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Galileo's method
The most suitable instrument for measuring the size of an atom is.
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Electron microscope
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Vernier calliper
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Optical Microscope
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Screw gauge
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