Two point charge `q_A=3muC` and `q_b=-3muC`are located 20 cm apart in vacuum. If a negative test charge of magnitude `1.5xx10^(-9)C` is placed at the midpoint, what is the force experienced by the test charge ?

Two point charge q_(A) = 3 muC and q_(B) = -3 muC are located 20 cm apart in vacuum. (a) What is the electric field at the mid point O of the line AB, joining the two charges. (b) If a negative test charge of magnitude 1.5 xx 10^(-9)C is placed at this point. What is the force experienced by the test charge?

Two point charge q_A=3muC and q_b=-3muC are located 20 cm apart in vacuum.What is the electric field at the midpoint 0 of the line AB joining the two charge ?

Two point charge of 20muC and 80muC are placed 18cm apart .Find the position where the electric field is zero.

Two fixed point charges +16 mu C and -9 mu C are placed 8 cm apart in air. Where should a third point charge be placed so that, the third charge is in equilibrium

Four point charges q_A= +5 muC, q_B = -5 muC, q_C = +5 muC, and q_D=-5muC are located at the corners of a square ABCD of side 10 cm. What is the force on a charge of 1 muC placed at the centre of the square?

Two charges 2muC and -2muC are placed at points A and B is 6 cm apart:- Identify an equipotential surface of the system.