Question

A teacher places a metal can on top of an insulating foam cup and touches the side of the foam cup with a negatively charged rod. The setup is shown in the picture below. What will happen to the negatively charged electrons when the rod touches the foam cup? (1 point) Responses The electrons will transfer to the foam cup and will remain in a concentrated, positively charged area on the cup where the rod was placed. The electrons will transfer to the foam cup and will remain in a concentrated, positively charged area on the cup where the rod was placed. The electrons will transfer to the foam cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed. The electrons will transfer to the foam cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed. The electrons will transfer from the foam cup to the metal can, causing both cup and can to have a positive charge. The electrons will transfer from the foam cup to the metal can, causing both cup and can to have a positive charge. The electrons will transfer from the foam cup to the metal can, causing both the cup and can to have a negative charge. answer correctly

Answer 1

When the negatively charged rod touches the insulating foam cup, the excess electrons from the rod will transfer to the foam cup. Since the foam cup is an insulator, the electrons will remain in the cup rather than spreading out or moving freely. Therefore, the correct response is:

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