Question

Three point charges are arranged at the corners of a square of side l as shown in the figure. What is the potential at the fourth corner (point A), taking =0 at a great distance?

Answer 1

Thus the electric field at the fourth corner is  E4 = kQ.[ 2/a2 + 1/a√2 ]

Explanation:

We are given that:

Number of point charges = 3

here, we shall use the superposition principle to calculate the net electric field at the fourth point, so

E4 = E1 + E2 + E3

E4 = kQ/a2 + kQ/√(2a2) + kQ/a2

E4 = kQ.[ 1/a2 + 1/√(2a2) + 1/a2 ]

E4 = kQ.[ 2/a2 + 1/a√2 ]

Thus the electric field at the fourth corner is  E4 = kQ.[ 2/a2 + 1/a√2 ]

Answer 2

Answer: skaownalxbwldhwodbwkdbwjdbs

Explanation: