Question

Two point charges q_A =3µC are q₈ = 3µC and located 20 cm apart in vacuum.

(i) What is the electric field at the midpoint O of the line AB joining the two charges?

(ii) If a negative test charge of magnitude 1.5 x 10⁻⁹ C is placed at this point, what is the force experienced by the test charge?

Answer 1

 (i) Electric field at O 

(ii) If a charge of -1.5 × 10^-9 C is placed at O, then the force it experiences=E×q= –8.1 × 10^-3 N along OA