|9.1.1: Five unknown charges are shown on the screen along with vectors representing the forces on each charge.||
9.1.2: One fixed charge and one "test" charge is shown in each animation. You can click-drag on the "test" charge to change its position.
|9.1.3: A fixed particle with an unknown charge distributed uniformly distributed about its volume is shown. The vectors shown point in the direction of the electric field and the color of the vectors represent the field's magnitude.|
|9.1.4: Four charged particles are shown in the animation. You can click drag any of these particles. If you overlap two charges, their charge values will add.||9.1.5: A 1 milligram particle with a charge of 2 mC is fired into an unknown electric field as shown above.||9.1.6: An unknown charge (#1) is shot into a region containing four fixed charges, one of which is known to be positive.|
|9.1.7: Two fixed charges are shown in black. Drag the small green test charge around the screen.||9.1.8: A drift tube is shown. The green dots represent atomic clusters of charge 1 nC and the blue ones clusters of charge -2 nC.|
|9.1.ap 1: Five unknown charges are shown on the screen along with vectors representing the forces on each charge. You can click-drag on any charge to change its position.||9.1.ap 2: Two like-charged 500 gram spheres attached to rigid rods form an electroscope as shown in the animation. You may drag the spheres to whatever position you wish before or during the animation.|
|9.1.ap 3: Double-click inside the animation to draw field lines and then decide which of the following statements is true.|