In the microscopic view of electrical conduction in a copper wire, electrons are accelerated by an electric field and then collide with metal atoms after traveling about 3.4×10−8m. If an electron begins from rest and is accelerated by a field of 0.070 N/C, what is its speed when it collides with a metal atom?

Explanation:

1. Obtain the net force acting on the electron

The electric force equals the magnetic field times the charge of the particle:

The charge on the electron is .

2. Calculate the acceleration of the electron

3. Calculate the speed

Uniformly accelerated motion:

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )