Answer:
D) 5.2 kN/c
Step-by-step explanation:
Electric field due to infinity line charge
λ /2πε₀r = .3 x 10⁻⁶ x 2 x 9 x 10⁹ / 3 = 1.8 x 10³. It will be towards x axis.
Electric field due to point charge = k.q / r² = 9 x 10⁹ x 6 x 10⁻⁶ / 13 = 4.15 x 10³
x component of this field = 4.15 x 10³ x cos Ф = 4.15 x 10³ x 3 / √13
3.458 x 10³
Total electric field = 5.2 kN / C.