wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Transfer of Heat

Total questions: 25

Worksheet time: 7mins

Name
Class
Date
1.

Heat is a form of ________.

a)

temperature

b)

energy

c)

power

2.

Heat loss by _______ is mportant for living things.

a)

convection

b)

conduction

c)

radiation

3.

The rate of heat flow is _________.

a)

heat current

b)

temperature

c)

emissive power

4.

The unit of temperature gradient is ______.

a)

Nm-1

b)

Km-1

c)

Jm-1

5.

Body tissues are _______ conductors of heat.

a)

poor

b)

good

c)

shine

6.

_______ are used to measure temperature.

a)

Barometers

b)

Thermometers

c)

Conductors

7.

Heat is transmitted from the sun to the earth by ________.

a)

conduction

b)

convection

c)

radiation

8.

The SI unit for heat is ________.

a)

joule

b)

kilocalorie

c)

Btu

9.

A body emits energy in the form of ______ .

a)

temperature

b)

absorbent

c)

electromagnetic radiation

10.

The range of wavelength of thermal radiation is ________.

a)

about 1μm to 100μm

b)

about 400nm to 700nm

c)

about 20m to 20 km

11.

Human body temperature 37°C is equivalent to ______.

a)

300K

b)

310K

c)

98.6K

12.

The best insulator is ________.

a)

air

b)

wood

c)

copper

13.

The rate of heat conduction is directly proportional to the _______.

a)

length of the bar

b)

cross-sectional area

c)

fourth power of temperature

14.

The unit of Wm-1K-1 is the unit of ________.

a)

temperature gradient

b)

thermal conductivity

c)

heat current

15.
Heat always flows from a __________________ to a cooler object.
a)
warmer
b)
cooler
c)
coolest
d)
warmest
16.
In ____________, heat is transferred by the currents within a fluid.
a)
conduction
b)
convection
c)
convection currents
d)
radiation
17.
A ______________ is a material that does not transfer thermal energy well.
a)
insulator
b)
conductor
c)
reflector
d)
radiator
18.
What are waves that can transfer heat through the vacuum of empty space?
a)
Electromagnetic waves
b)
Convection
c)
Conduction
d)
Heat
19.

A body does not emit heat energy at ______.

a)

273K

b)

0°C

c)

0K

20.

Sea breezes and land breezes are due to ________ process.

a)

conduction

b)

convection

c)

radiation

21.

 Tc= 59(Tf32)Tc=\ \frac{5}{9}\left(Tf-32\right) 
At the temperature _______ degree, Celsius temperature is equivalent to Fahrenheit temperature.

a)

40

b)

-40

c)

0

22.

If the absolute temperature of a black body is doubled, its emissive power is _______ times increased.

a)

8

b)

16

c)

4

23.

The unit of total emissive power is _______.

a)

Km-2

b)

Wm-2

c)

Wm-1K-1

24.

For other body the emissivity value is ______.

a)

e=1

b)

e<1

c)

e>1

25.

The mathematical expression for Stephan-Boltzmann's law is _________.

a)

ε=eε₀

b)

ε₀=σT4

c)

H=eσAT4