What is the electric field strength?

Question

An electron moving parallel to a uniform electric field increases its speed from 2.4×10⁷ m/sm/s to 3.6×10⁷ m/sm/s over a distance of 1.7 cm cm

Answer 1

Step 1:

The initial speed is .

The final speed is .

Distance travelled by the electron is .

Find the acceleration of the electron.

Apply formula: .

.

Step 2:

The electric field strength is .

.

Apply formula: .

.

Substitute mass of the electron , charge of the electron  and .

=.

The electric field strength is .

Solution:

The electric field strength is .