Name: _______________________

Quiz 4

02/17/2006

Ch. 19

1) 3 charges are placed at the corners of a square with 3m sides: -1mC at bottom left, ‑3mC at the bottom right, and +4mC at the top left. Find the amount of work required to move the bottom left charge to the top right?

2) A 5mC charged sphere is connected to a spring with spring constant k of 50 N/m and placed in a constant electric field E of 1000 V/m pointing in the same direction as the spring’s extension. The charge has a velocity of 10m/s when the spring is unstretched.

a) What is the maximum extension of the spring?

b) What is the maximum compression of the spring?