Run the “Balloons and Static Electricity” simulation. Rub the balloon on the sweater several times. When this is done, what charges are on the balloon and on the sweater?
a. Both have extra minus charges.
b. Charges move back and forth between the balloon and sweater, but overall no (or very little) net change in the charge distribution.
c. Balloon gets an excess of positive charges and the sweater gets an excess of negative charges.
d. Both have extra plus charges.
e. Sweater gets an excess of positive charges and the balloon gets an excess of negative charges. Correct
Run the Electric Field Hockey simulation. Leave the simulation in “Level 1”. Place a positive charge above (about halfway between the puck and the top of the simulation window) and slightly to the left of the (positive) puck.
Electric Field Hockey simulation: Positive charge above and slightly to the left of the puck.
Now place a charge directly below (at the same distance below the puck as the positive charge is above the puck) and also slightly to the left of the puck. Try both a positive charge, and then a negative charge. (Remove the second positive charge before trying the negative charge.)
What sign of the second (bottom) charge succeeds in getting the puck into the goal post?
a. Neither will work
b. Both will work
d. Positive Correct
Run the Electric Field Hockey simulation, and set it to Level 1. Place three positive charges as shown in the picture below, then run the simulation. Adjust the positions of the charges until you succeed in hitting the goal.
Electric Field Hockey simulation: Three positive charges arranged to make the goal.
In the picture, which arrow best represents the direction of the puck’s acceleration as it passes by the wall?
a. Downward (a)
b. To the left (b)
c. Upward (c) Correct
d. To the right (d)
Run the “Electric Field of Dreams” simulation. Add multiple (more than 5) negative charges to the box. What do the charges do?
a. Clump together
b. Spread out uniformly throughout the interior of the box.
c. Make a uniform layer on the walls.
d. Something else. Correct