Here you will explore the electric field produced by a number of charged lines and extended objects (cylinders, prisms, etc.). However, you can't see the charged objects.
The program displays a rectangular area that contains some hidden charges. The situation looks something like this:
The program draws a field arrow at the mouse pointer's position (just like last time). But there are two (or maybe three) more things you can do here:
How many charged objects are in the rectangular area?
Give the coordinates, magnitudes and signs of all the hidden charges. For a charge that is not a point charge, give the coordinates of the approximate center of the distributed charge. The coordinates of the point where the cursor is located appear in the browser's status line at the bottom of the window. If you manage to put the cursor directly on a line charge, the arrow will disappear, and a small circle will appear there.
Indicate which charges are point charges and which are spread over some finite area.
For each of the non-point charges, indicate the shape of the charge distribution. Is it square, circular, or something else?
At how many points in the area is the electric field equal to zero?
Give the coordinates of those points where E = 0.
When you have finished here, try some practice questions.