AP EAMCET202120 Aug 2021Evening ShiftPhysicsElectrostaticsActual
Two charges 10 μC and - 10 μC are placed at points A and B separated by a distance of 10 cm . Find the electric field at a point P on the perpendicular bisector of A B, at a distance of 12 cm from its mid-point.
Options
- A16 . 4 × 10 6   N   C - 1
- B28 . 4 × 10 6   N   C - 1
- C8 . 2 × 10 6   N   C - 1
- D4 . 1 × 10 6   N   C - 1
Correct answer
D. 4 . 1 × 10 6   N   C - 1
Step-by-step solution
The net electric field, E net = 2 E A cos θ From the arrangement of chargers, cos θ = 5 13 Net electric field, E net = 2 × 9 × 10 9 × 10 × 10 - 6 13 × 10 - 2 2 × 5 13 ⇒ E net = 4 . 1 × 10 6   N / C