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WorksheetsTransfer of Heat
Total questions: 25
Worksheet time: 7mins
Heat is a form of ________.
temperature
energy
power
Heat loss by _______ is mportant for living things.
convection
conduction
radiation
The rate of heat flow is _________.
heat current
temperature
emissive power
The unit of temperature gradient is ______.
Nm-1
Km-1
Jm-1
Body tissues are _______ conductors of heat.
poor
good
shine
_______ are used to measure temperature.
Barometers
Thermometers
Conductors
Heat is transmitted from the sun to the earth by ________.
conduction
convection
radiation
The SI unit for heat is ________.
joule
kilocalorie
Btu
A body emits energy in the form of ______ .
temperature
absorbent
electromagnetic radiation
The range of wavelength of thermal radiation is ________.
about 1μm to 100μm
about 400nm to 700nm
about 20m to 20 km
Human body temperature 37°C is equivalent to ______.
300K
310K
98.6K
The best insulator is ________.
air
wood
copper
The rate of heat conduction is directly proportional to the _______.
length of the bar
cross-sectional area
fourth power of temperature
The unit of Wm-1K-1 is the unit of ________.
temperature gradient
thermal conductivity
heat current
A body does not emit heat energy at ______.
273K
0°C
0K
Sea breezes and land breezes are due to ________ process.
conduction
convection
radiation
Tc= 95(Tf−32)
At the temperature _______ degree, Celsius temperature is equivalent to Fahrenheit temperature.
40
-40
0
If the absolute temperature of a black body is doubled, its emissive power is _______ times increased.
8
16
4
The unit of total emissive power is _______.
Km-2
Wm-2
Wm-1K-1
For other body the emissivity value is ______.
e=1
e<1
e>1
The mathematical expression for Stephan-Boltzmann's law is _________.
ε=eε₀
ε₀=σT4
H=eσAT4
