Question

Point charge q1 and q2 both of 22nC are separated by a distance of 58cm along horizontal axis point a is located 40cm from q1 and 18 cm from q2. What is the magnitude and direction of the electric field at point a

Answer 1

E = 4.01×10^6 N/C

direction is toward q2

Step-by-step explanation:

q1 = q2 = 12micro-C = 12×10^-6C

r1 = 18cm = 0.18m

r2 = 40cm = 0.40m

k = 9×10^9

E1 = kq1/(r1)²

E1 = 3.33×10^6 N/C

E2 = kq2/(r2)²

E2 = 6.75×10^5 N/C

Enet = E1 + E2

= 3.33×10^6 + 6.75×10^5

= 4.01×10^6 N/C

direction is toward q2