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Physical Quantities, Standards and Units


7. 

60o is equal to

Answer : A. Π /3 radians

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8. 

The power of a lens is measure in

Answer : D. dioptre

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9. 

The unit of work and energy is

Answer : A. Joule

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10. 

"Decibal" is a unit of

Answer : A. sound intensity

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11. 

Unit of charge is

Answer : A. Coulumb

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12. 

Consider the following statements:
I. Pressure is measured in newton per m2
II.Strees is the force acting on unit area
III. Stress and Pressure have the same unit
IV. Stress is 1/3rd of the pressure in an area

Answer : C. I,II and III are correct

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