Chapter 4: Q42E (page 713)
A point charge is placed at each corner of a square with side length a. All charges have magnitude q. Two of the charges are positive and two are negative (Fig. E21.42). What is the direction of the net electric field at the canter of the square due to the four charges, and what is its magnitude in terms of q and a?
Short Answer
Answer:
If a point charge is kept at a corner of a square with side length a, and all charges have the magnitude of q. And if two of them are positive and two of them are negative, therefore the direction of the net electric field at the centre due to the charges due to the four charges is in the direction. And the magnitude in terms of q and a is