Electric PotentialMediumQuestion 31450
Question
Potential at centre of a square with charges +q at all four corners (side L) is:
- A4kq/L
- B2√2 kq/L
- C4√2 kq/LCorrect
- D4kq/(L√2)
Correct answer
4√2 kq/L
Explanation
Distance from corner to centre = L√2/2. V = 4 × kq/(L√2/2) = 4 × 2kq/(L√2) = 8kq/(L√2) = 4√2 kq/L.