An electron traveling parallel to a uniform electric field increases its speed from 2.0 * 107 m/s to 4.0 * 107 m/s over a distance of 1.2 cm. what is the electric field strength?

The electric field strength is

Explanation:

Given that,

Initial velocity

Final velocity

Distance = 1.2 cm

We need to calculate the acceleration

Using equation of motion

Put the value into the formula

We need to calculate the electric field strength

Using formula of electric force

Put the value into the formula

Hence, The electric field strength is

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that would be because of both gravity and friction. so     c