Physics - Units And Measurement

Test Preparation on Physics - Units And Measurement

1.

Which of the following quantities is not dimensionless?

1Reynold's number
2Strain
3Angle
4Radius of gyration

2.

Which of the following pairs have the same dimensions?

1Torque and work
2Angular momentum and work
3Energy and Young's modulus
4Light year and wavelength

3.

Which of the following physical quantities has neither dimensions nor units?

1Angle
2Luminous intensity
3Coefficient of friction
4Current

Coefficient of friction =Applied force/Normal reaction [MLT-2]/[MLT-2]= No dimensions Unit = N/N= No unit

4.

Which of the following is dimensionally correct?

1Specific heat = joule per kilogram kelvin
2Specific heat = newton per kilogram kelvinX
3Specific heat = joule per kelvin
4None of the above

5.

Which of the following is not correct for dimensionless quantity ?

1It does not exist
2It always has a unit
3It never has a unit
4It may have a unit

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