Question

Total momentum of electrons in a straight wire of copper of length 1m carrying a current of 16a is

Answer 1

Answer:

Total momentum of electrons in a straight wire of copper of length 1m carrying a current of 16a is 9.1 x 10 ⁻¹¹ Kg-m/s

Explanation:

I=nAeVd

where vd is the drift velocity  

n is the number of electrons

Take number of electrons N=nAL

Total momentum= P =Nxmxvd

P=nALxm x (I/neA)

P=L Im/e

where m is the mass of electron

e is the charge of the electron

=16x 1x 9.1 x 10 ⁻³¹/1.6 x 10⁻¹⁹

=10x 9.1 x 10⁻¹²

=9.1 x 10 ⁻¹¹ Kg-m/s