A charge q1 = 7 μC is located at the origin, and a second charge q2 = -5 μC is located on the positive x-axis, 0.3 m from the origin. Find the electric field at point P, which has coordinates (0, 0.4) m. Coulomb constant is given by, \({k_e} = \frac{1}{{4\pi {\epsilon_0}}} = 8.99 \times {10^9}N.\frac{{{m^2}}}{{{C^2}}};{\epsilon_0}\) is the permittivity of free space; (i, j) are the unit vectors along x, y axes.
1
–(1.1i + 2.5j) × 105 N/C
2
(1.1i + 2.5j) × 105 N/C
3
(2.5i – 1.1j) × 105 N/C
4
–(2.5i + 1.1j) × 105 N/C