Question

a wire with an area of cross section as 10mm2 has a resistance of 5 ohm, when a potential difference across its ends is 25V. Calculate the drift velocity of electrons. Given the number density of electrons as 5×10 20 electrons per cubic meter.

Answer 1

Hey Mate..!!

Here's Your Answer..!!

The formula for drift velocity is I=neav with symbols in their usual meanings as Current in amperes, Number of electrons, charge of electron, area of cross section of wire, and drift velocity
I= V/R
Number of electrons= area x density
You only need to substitute those values in the above formula and find out v from it which will be your drift velocity.

This will fetch you the answer..

Hope This Helps..!!

#BeBrainly❤️

Answer 2

I = neAVd

Where,

n = no° of electrons

A= cross section area

e = charge on e-

Vd= drift velocity

Put all the given values in this formula and get ur answer...TRY URSELF...

Note- units should be same... Convert mm to m.

Try it