Question

Given that the charge on an electron is -1.6 x 10^-19 Coulombs, what is the magnitude of the electric force on an electron in Newtons when it is placed in an electric field of strength 12,000 Volts/m? A)1.6 x 10^-19 B)3.2 x 10^-19 C)1.92 x 10^-15 D)6.4 x 10^-19 E)4.5 x 10^22

Answer 1

Given,

The charge on an electron is

`q=-1.6*10^(-19)\text{ C}`

The electric field strength is

`E\text{ = 12,000 Volts/m}`

Solution:

The electric force is calculated by the formula,

`F=qE`

Put the given values in the formula.

`\begin{gathered} F=(1.6*10^(-19)\text{ C\rparen}*(12,000\text{ Volts/m\rparen} \\ F=19.2*10^(-16)\text{ N} \\ F=1.92*10^(-15)\text{ N} \end{gathered}`

Thus, the given options c is correct.