A teacher places a metal can on top of an insulating foam cup and touches the side of the cup with a negatively charged rod. The setup is shown in the picture below.

Question

What will happen to the negatively charged electrons when the rod touches the foam cup?

(1 point)
Responses

The electrons will transfer to the cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed.
The electrons will transfer to the cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed.

The electrons will transfer to the cup and will remain in a concentrated, positively charged area on the cup where the rod was placed.
The electrons will transfer to the cup and will remain in a concentrated, positively charged area on the cup where the rod was placed.

The electrons will transfer from the cup to the metal can, causing both the cup and can to have a negative charge.
The electrons will transfer from the cup to the metal can, causing both the cup and can to have a negative charge.

The electrons will transfer from the cup to the metal can, causing both cup and can to have a positive charge.

Answer 1

When the negatively charged rod touches the foam cup, the excess electrons from the rod will transfer to the cup. As a result, the cup will become negatively charged due to the addition of these electrons.

The correct response would be:

The electrons will transfer to the cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed.

This indicates that the area where the rod made contact will have a higher concentration of negative charge because of the transferred electrons.