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Worksheetsunits and dimensions
Total questions: 20
Worksheet time: 9mins
the mass per unit volume has the dimensions of ......
M L−2
M L−3
M
M −1 L
If force (F), acceleration (a) and time (T) are used as the fundamental units, the dimensional formula for length will be:
F0 a T2
F a0 T2
F a2 T0
F a T
Unit of angular acceleration is SI system:
N kg-1
m sec-2
rad sec-2
km kg-1
erg m-1 can be the unit of the measure of
force
momentum
power
acceleration
The unit of force and length are doubled, the unit of energy will be :
1/4 times
1/2 times
2 times
4 times
Length cannot be measured by
fermi
debye
micron
light year
Angular momentum has the same dimensions as :
Planck's constant
Universal gravitational constant
Rydberg constant
Boltzmann constant
If P is the pressure , ρ is the density and E is the energy of a bubble , the quantity P-5/6 ρ1/2 E1/3 has got the dimensions of :
length
mass
time
velocity
There are______ fundamental quantities
6
5
9
7
1 micrometer equals to
10 −9 m
10 −3 m
10 −6 m
10 −1 m
Physical quantity =______* unit
Numerical value
Length
Area
Density
Derived units are the units of ______ physical quantities which are expressed in terms of fundamental units
Fundamental
Derived
Base
Supplementary
Scientific notation of: 0.000345
3.45x104
3.45x10-4
34.5x104
3.45x10-5
Dimensional formula of density is
[M1L2T0]
[M1L-3T0]
[M1L1T0]
Which of the following is a derived?
temperature
moles
velocity
current
If U1 and U2 are the units used to measure the same physical quantity and N1, N2 are their numerical values, then the relation between them......
N1U1=N2U2
N1N2=U1U2
N1/N2 = U1/U2
NiUI+N2U2
Area, volume, speed, force etc., are examples of
Fundamental unit
Fundamental quantity
Derived unit
Derived quantity
The physical quantity having units of mass is
Inertia
Density
Momentum
Volume
The symbol for amount of substance is
mol
Mole
Candela
All the above
The unit of plane angle is
Steredian
Radian
Mol
Candela
