Question

In the figure below, four point charges lie on the comers of a square, with a fifth point charge qn located at the center. The two left-most charges have the same negative charge qn while the two right-most charges have the same positive charge qp. Assume that the center charge q is negative. What is the direction of the total electric force on the charge q at the center of the square? Indicate the direction by dragging the appropriate arrow into the box. What is the direction of the electric field at the center of the square, due to the four comer charges?

Dynamics

Answer 1

1. B. oblique Impact

2. True

3. False

4.B. Sum to zero

5. D. displacement

6. C. non-impulsive force

7. A. 20 kg m/s

8. D. 50 m/s

Answer 2

1. Electric force between similar charged particles is repulsive and differently charged particles is attractive.

2. Electric field is always towards negative charge and away from positive charge.

Answer 3

1. B oblique impact

2. True

3.False

4.B sum to zero

5.D displacement

6.C non-impulsive force

7.A 20 kg m/s

8. m1v1 = m2v2

20 * 1000 = (20+380) * v2

20000 = 400 * v2

hence v2 = 50m/s

option D