Drift Velocity

Question

If the drift velocity of electrons in a conductor is v, what happens to it when the current is doubled (assuming constant cross-section)?

RankGuru · Accepted Answer

1. **Current Equation**: The macroscopic current $I$ is related to microscopic drift velocity $v_d$ by:
   - $I = nAev_d$.
2. **Analyze Parameters**: 
   - $n$ (charge density), $A$ (area), and $e$ (electronic charge) are constants for the given conductor.
3. **Proportionality**: $I \propto v_d$. This means current and drift velocity are directly linked.
4. **Conclusion**: If current $I$ doubles ($2I$), then the drift velocity $v_d$ must also double to **$2v$**.

Drift Velocity

Select the correct option:

Solution

🔒 Solution Hidden from View

More drift velocity Practice Questions

A copper wire carries a steady current while free electrons drift slowly through it, so how does the...

A copper wire of cross-sectional area (2 \times 10^{-6}) m(^2) carries a current of 3.2 A, with ...

Drift velocity v_d relates to current I by I = ?

Drift velocity v_d relates current by I = n A e v_d. Increasing cross-sectional area keeping current...

About This Question

Solution