Question

When a potential difference $\left(V\right)$ is applied across a conductor, the thermal speed of electrons is

• A. Zero
• B. proportional to $\sqrt{T}$
• C. proportional to $\left(T\right)$
• D. proportional to $V$

Answer 1

The correct option is B proportional to $\sqrt{T}$

$\because$ Thermal velocity of the electron is given by,

$v_T=\sqrt{\frac{3k_{B}T}{m_e}}$

i.e. $v_T\propto \sqrt{T}$