Three charges $q_1=7nC,q_2=-4nC$ and $q_3=-3nC$ are arranged as shown in the diagram below.

Determine the E$-$field and potential at the point A and point B as shown on the diagram.

Determining the electric field at point $A$ :

Intermediate work:

$\backslash$table$[[E_{At}$ A due to $q1=,\frac{N}{C},=,|],[$At A due to $q^2=,\frac{N}{C},=,]]$

Net electric field at point $A$

vec$(E{)}_{\text{n}\text{e}\text{t}}$ at $A=\frac{N}{C},=$ degrees

Determining the potential at point A:

Intermediate work:

$V_{At}$A due to $q1=$

volts

$V_{At}$A due to $q_2=$ volts

$V_{At}$ A due to $q^3=$ volts