Physics, asked by rishab9375, 1 year ago

If the length of a wire conductor is doubled by stretching it, keeping the potential difference across it constant, by what factor does the drift speed of electrons change?

Answers

Answered by handgunmaine
4

The new drift velocity will gets halved.

Explanation:

Ohm's law is given by :

V=IR

Drift velocity is given by :

v_d=\dfrac{I}{neA}  ......(1)

Resistance of wire is given by :

R=\rho \dfrac{l}{A}

If the length is doubled, l'=2l

New resistance becomes :

R'=\rho \dfrac{l'}{A}\\\\R'=\rho \dfrac{2l}{A}

R'=2R

Now,

I'=\dfrac{V}{R'}\\\\I'=\dfrac{V}{2R}\\\\I'=\dfrac{I}{2}

New drift velocity will be :

v_d'=\dfrac{I'}{neA}\\\\v_d'=\dfrac{v_d}{2}

So, the new drift velocity will gets halved.

Learn more,

If the length of a wire conductor is doubled by stretching it, keeping the potential difference across it constant, by what factor does the drift speed of electrons change?

https://brainly.in/question/15509106

Answered by bingoharsh012
0

Answer:

its drift velocity will be halved

Explanation:

when the potential difference is constant the length is inversly proportional to drift velocity

Similar questions