"Pascal - second" has the dimensions of:
force
energy
pressure
Coeffecient of viscosity
The dimensional formula for frequency is
T
T-1
T-2
T2
If the unit of force and length are doubled, then unit of energy will be :
Same
2 times
4 times
16 times
If force F, velocity v and time T are chosen as the base units then the dimension of mass in terms of these are
FVT-2
FV-1T
FV-1 T-1
FVT
Which one of the following is not a dimensionless quantity?
Strain
Solid angle
Planck's constant
Dielectric constant
Mass of electron is 9.1 x 10-31 kg. The order of magnitude of mass of electron is
- 31
- 30
- 32
- 29
In an experiment the angles are required to be measured using an instrument.29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale.If the smallest division of the main scale is half - a - degree (=0.5°), then the least count of the instrument is
one minute
half minute
one degree
half degree
A certain body weighs 22.42 g and has a measured volume of 4.7 cc.The possible error in the measurement of mass and volume are 0.01 g and 0.1 cc.Then maximum error in the density will be
22%
2%
0.2%
0.02%
The wave used in SONAR is
Radio wave
Ultrasonic wave
Light wave
Electric pulse
The force F on a sphere of radius r moving in a medium with velocity v is given by F = 6π ηrv.The dimensions of η are
[ML-3]
[MLT-2]
[MT-1]
[ML-1T-1]