Questions
On increasing the temperature of a conductor, its resistance increases because
a
relaxation time decreases
b
mass of the electrons increases
c
electron density decreases
d
None of the above
detailed solution
Correct option is A
Resistance of conductor depends upon relaxation time as R ∝ 1τ. With rise in temperature rms speed of free electrons inside the conductor increases, so relaxation time decreases and hence resistance increases.Talk to our academic expert!
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A strip of copper and another of germanium are cooled from room temperature to 80 K. The resistance of
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