1.
Explain
how
heat
is
conducted
from
the
heated
end
of
a
rod
to
its
cold
end
.
2.
With
an
example
of
each
,
explain
the
uses
of
good
and
bad
conductors
of
heat
.
D. LONG-ANSWER QUESTIONS: Answer
MATERIALS
Answers
Explanation:
(a) solid only
In conduction, the molecules vibrate and hit each other to transfer the heat energy between them. The molecules need not to travel from one end to other. Therefore, it is only possible in solids in which the molecules do not move but vibrate on heating.
Heat is conducted from the heated end of a rod to its cold end through the effective vibration of its molecules. ... When one end of the rod heats up, the molecules of that end starts vibrating and colliding with the nearby molecules to make them unstable.
(b) non- metals like wood, plastic etc. Thematerials which allow heat to flow through them easily are called good condutors of heat. ... the materials which do not allow heat to flow through them are called bad conductor of heat . For eg - air , water , and most liquids and gases are bad conductor of heat
Gold, Silver, Copper, Aluminium, Iron etc are good heat conductors as well as electrical conductors
Answer:
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