$1\mathrm{.}1.$ The electric dipole will...

$[$select oneone letter corresponding to the correct answer below.$]$

A$)...$twist clockwise.

B$)...$twist counterclockwise.

C$)...$not rotate at all.

Correct, computer gets: B

Hint: $($Explanation$)$ The answer is B$.$ The external positive charge repels the positive end of the electric dipole and attracts the other end. This leads to a torque that rotates the dipole as described.

$2\mathrm{.}2.$ The electric dipole will...

$[$select oneone letter corresponding to the correct answer below.$]$

A$)...$accelerate upwards.

B$)...$accelerate downwards.

C$)...$not accelerate.

Correct, computer gets: A

Hint: $($Explanation$)$ The answer is A$.$ The external positive charge repels the positive end of the electric dipole and attracts the other end. The horizontal components of these forces cancel, but the vertical components reinforce each other, leading the dipole to accelerate as described.

$3\mathrm{.}3.$ Suppose that the electric dipole has a length of $4$ mm and the positive end has charge $6$ nC$.$ Let's say that the external particle is $2$ cm from both ends of the dipole, carrying a charge of $4$ $$C$.$ What is the net electric force acting on the dipole?

$[$A positive net force points up$,$ a negative one points down.$]$

Fnet $=$