In SI system of unit,the unit of pressure is
Atmosphere
dynes per square cm
pascal
torr
The dimensional formula for permeability of free space,μ0 is
[MLT-2A-2]
[ML-1T2A-2]
[ML-1T-2A2]
[MLT-2A-1]
One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume).What is the ratio of molar volume to the atomic volume of a mole of hydrogen ?(Take the size of hydrogen molecule to be about 1 Å).
7 x 104
7 x 105
7 x 10-4
7 x 10-5
The angle 1° 54′ equal to
2.91 x 10-4 radian
3.32 x 10-2 radian
1.21 x 10-6 radian
none of these
The dimensional formula of gravitational constant G is
[ML-1T-1]
[MLT2]
[M-1L3T-2]
[M2L-1T2]
If σ = surface charge density,ε = electric permeability,the dimensions of σ/ε are same as
Electric force
Electric field intensity
Electric charge
Pressure
A LASER beam at moon returns after 2.56 s from moon.What is the radius of the orbit of moon (lunar orbit) around the earth?
3.84 x 108 m
3 x 108 m
3.84 x 104 m
3.84 x 1010 m
Curie is the unit of :
Half-life period
Decay constant
Radioactivity
Nuclear force
Which two of the following five physical parameters have the same dimensions?
(i) Energy density
(ii) Refractive index
(iii) Dielectric constant
(iv)Young's modulus
(v) Magnetic field
(ii) and (iv)
(iii) and (v)
(i) and (iv)
(i) and (v)
The error in the measurement of radius of a sphere is 2% .What would be the error in the volume of the sphere?
4 %
8 %
3 %
6 %
