Question

The mean free path of electrons in a metal is 4 x 10-8m. Find the electric field , in units

of V/m, which can give on an average 2 eV energy to an electron in the metal.​

Answer 1

Explanation

Correct option is

C

5×10

7

Energy =2eV

eV

0

=2eV

0

⇒V

0

=2

Now, electric field E=

4×10

−8

2

=0.5×10

8

=5×10

7

V/m