Units are classified into ______ groups.
4
2
5
6
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A unitless quantity
has no dimensions.
always has a non-zero dimension.
may have a non-zero dimension.
never has a zero dimension.
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_______ is needed for the experimental verification of various theories.
Unit
Measurement
Instrument
Symbol
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The magnitude of the difference between mean value and each individual value is called _______.
most probable error
true error
absolute error
error in reading
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Maxwell’s equations relate to _______.
law of gravitation
basic laws of electromagnetism
laws of electrostatics
nuclear model of an atom
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Accidental error can be minimised by…
taking only one reading.
selecting instrument with small least count.
taking small magnitude of the quantity.
selecting instrument with greater least count.
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Temperature can be expressed as a derived quantity in terms of…
none of these
mass and time
length, mass and time
length and mass
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In which of following system, scientific data can be exchanged between different parts of the world?
F.P.S.
S.I.
C.G.S.
M.K.S.
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The length of a rod is 0.5 x 10
2
m, the order of magnitude of the length of the rod is
10
-
1
m
10
2
m
10
3
m
10
1
m
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Which of the following quantity is expressed as force per unit area?
work
volume
density
pressure
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