Question

The figure below shows three small, charged beads, all lying along the horizontal axis. Bead A, at left, has a 5.85 nC charge. Bead B has a 1.00 nC charge and is 3.00 cm to the right of A. Bead C has a

−2.25 nC

charge and is 2.00 cm to the right of B.

Three charges lie along a horizontal line. A positive charge labeled q_A is on the left. 3.00 cm to its right is a positive charge labeled q_B. 2.00 cm to the right of q_B is a negative charge labeled q_C.

(a)

What is the magnitude (in N/C) of the electric field at a point 2.00 cm to the right of A?

Draw the directions of the electric field vectors, due to each of the three charges, at the point to the right of A. What are the signs of the charges? How does this affect the directions of the field vectors? What is the magnitude of the electric field due to a point charge? Add the fields as vectors to get the net field. Be careful with units and signs. N/C

(b)

A fourth bead with a charge of −8.00 nC is placed at this point. What are the magnitude (in N) and direction of the net electric force on it?

magnitude Ndirection ---Select--- upward downward toward the left toward the right

Answer 1