An infinite line charge of linear density λ = 0.30 μc/m lies along the z axis and a point charge q = 6.0 µc lies on the y axis at y = 2.0 m. the x component of the electric field at the point p on the x axis at x = 3.0 m is approximately . a) 1.8 kn/c b) 4.2 kn/c c) 0.96 kn/c d) 5.2 kn/c e) 0.64 mn/c

D) 5.2 kN/c

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.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s