Question

Write the equation for the relationship between specific conductivity (\( \sigma \)) and drift velocity (\( v_d \)). 
 

Hint:

The drift velocity of charge carriers is proportional to the current and the specific conductivity of the material.

Answer 1

Specific conductivity (\( \sigma \)) is related to the drift velocity (\( v_d \)) by the equation: \[ \sigma = nq v_d A, \] where:
- \( n \) is the number density of charge carriers,
- \( q \) is the charge of the carriers,
- \( A \) is the cross-sectional area of the conductor.