1.
Zero error of an instrument introduces
A
systematic error
B
random error
C
instrumental error
D
none of these
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Zero error of an instrument introduces
systematic error
random error
instrumental error
none of these
Which of the following quantity is expressedas force per unit area?
work
pressure
volume
density
Which of the following is the CORRECT way of writing units?
25 ms length
30 Kg
5 Newton
10 N
Which of the following is NOT a dimensionless quantity?
angle
strain
specific gravity
density
Which of the following is NOT a derived unit?
joule
erg
dyne
mole
Which of the following is NOT a characteristic of a good unit?
It is invariable.
It is reproducible.
It is perishable.
It is easily available
Which of the following is a supplementary unit?
steradian
candela
kelvin
pascal
Universal time is based on
rotation of the earth on its axis.
Earths orbital motion around the Sun.
vibrations of cesium atom.
oscillations of quartz crystal.
Units are classified into ..............groups.
2
4
5
6
To measure the distance of a planet from the earth ..............method is used.
echo
direct
parallax
paradox
The value of the magnitude rounded off to the nearest integral power of 10 is called
significant figure
uncertain number
significant number
order of magnitude
The SI unit of luminous intensity is
watt
lux
lumen
candela
The reference standard used for the measurement of a physical quantity is called
standard quantity
dimension
constant
unit
The physical quantity having the same unit in all the systems of unit is
length
time
mass
foot
The number of significant figures in 0.400 is
1
2
3
4
The number of significant figures in 0.0500 is
4
3
2
1
The number of significant figures in 0.0009 is
4
3
2
1
The mass of the body depends only on
temperature.
pressure.
quantity of matter contained in the body.
location of the body from the observer
The magnitude of the difference between mean value and each individual value is called
absolute error
error in reading
most probable error
true error
The difference between the true value and measured value is called
mistake
error
significant figures
fault