Current Electricity Charging Discharging Of Capacitors Question 345
Question: A metallic block has no potential difference applied across it, then the mean velocity of free electrons is $ T $ = absolute temperature of the block)
Options:
A) Proportional to $ T $
B) Proportional to $ \sqrt{T} $
C) Zero
D) Finite but independent of temperature
Show Answer
Answer:
Correct Answer: B
Solution:
In the absence of external electric field mean velocity of free electron $ ( V _{rms} ) $ is given by $ V _{rms}=\sqrt{\frac{3KT}{m}}\Rightarrow V _{rms}\propto \sqrt{T} $
BETA
