If the mass of the charge carriers increases by a factor of two, how will the conductivity of the material be affected?
Answer & explanation
Correct answer: option 2
Resistivity : ρ = \(\frac{m}{ne^{2}t}\)
Conductivity $\sigma = \frac{n e^2 t}{m}$
$\Rightarrow \sigma \propto \frac{1}{m}$
m : mass
n : number density
e : charge on electron
t : relaxation time