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Physical Quantities, Standards and Units

19. 

The unit of power is

A. kilowatt B. kilowatt-hour C. newton D. joule

Answer : A. kilowatt

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20. 

The unit of impedance is

A. Ohm B. Farad C. Henry D. Volt

Answer : A. Ohm

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21. 

Match List I(Quantity) with List - II (Units) and select the correct answer using the options

List I List II
a) High speed 1) Mach
b) Wavelength 2) Angstrom
c) Pressure 3) Pascal
d) Energy 4) Joule

A. a-2 ,b-1,c-3 ,d-4 B. a-1 ,b-2 ,c-4 ,d-3 C. a-1 ,b-2 ,c-3 ,d-4 D. a-2 ,b-1,c-4 ,d-3

Answer : C. a-1 ,b-2 ,c-3 ,d-4

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22. 

1 micron is

A. 10-9 metre B. 10-12 metre C. 10-6 metre D. 10-15 metre

Answer : C. 10-6 metre

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23. 

Watt = Volt x__________________

A. ohm B. ampere C. metre D. Hz

Answer : B. ampere

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24. 

Which one of the following is NOT correctly matched?

A. Kilowatt hour - Energy B. Celcius -Name of a king C. Balance wheel in watch- Invar D. Newton- Force

Answer : B. Celcius -Name of a king

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