Delhi Police Constable Exam Model Paper 5

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Question : 43 of 100

Marks: +1, -0

Heat supplied to a system is measured in ______.

kilowatts
degrees kelvin
amperes
joules

Solution:

The correct answer is option 4 i.e Joules.

Heat supplied to a system is measured in Joules.
The SI unit of heat energy transferred is expressed in Joule (J).
SI base units :Kg⋅m^2 ⋅s^{−2}
Joule is named after the English physicist James Prescott Joule
In terms of other SI units, a joule is defined as:
$J = {kg⋅m^2}/{s^2}= N⋅m = Pa⋅ m^3= W⋅s = C⋅V$

Symbol	Meaning
Kg	Kilogram
N	Newton
M	Metre
S	Second
Pa	Pascal
W	Watts
C	Coulomb
V	Volt

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