ONLY ANSWER PART C !!

6. Two charges q and Q are fixed in place along the x axis. Q = +3.8 nC is at x = -2.0 cm and

unknown charge q is located at x = 2.0 cm.

A. It is found that the net electric field is zero at x = -0.76 cm. What is the

magnitude and sign of charge q? = q=18.82nc

B. Sketch both the equipotential lines and the electric field for the system (you need to have at least 5 field lines for the smallest charge and 6 potential lines for each charge) = ALREADY SKETCHED OUT

ONLY ANSWER PART C. A proton is fired at infinity towards q along the line of the two charges with speed 7.4x104 m/s. How close the proton from charge a before it turns around?