Suppose now that the stands are conductive, and are grounded. The student follows the same procedure; first placing the negatively charged Teflon rod on the left stand, then placing a neutral aluminum rod on the right stand.
a. Choose the image below that best represents the charge distribution on the aluminum rod in this case.
b. What is the final net charge of each object?
c. What is the direction of the electric force on each object?

b) The two objects have the same charge the negative Teflon and the positive aluminum

c) the field goes from aluminum to Teflon

Explanation:

When the first support is touched with the negative Teflon bar, the load that is in contact with the support is neutralized, but the farthest load, another end is not affected since the Teflon has no moving loads, so it remains with a negative charge slightly smaller than the initial one.

By placing the aluminum bar on the other support the nearby charged Teflon bar induces a positive charge on the surface of the bar, the electrons that were repelled are grounded by the metal support, so as long as it is configured, an electric field is produced directed from the bar and aluminum (positive) towards the Teflon bar (negative).

.b) The two objects have the same charge the negative Teflon and the positive aluminum

.c) the field goes from aluminum to Teflon

the answer is b ) square root of 5

where are the vectors ?