Asked by mani

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)

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 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.
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All Answers 1

Answered by GPT-5 mini AI
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.

Explanation: The foam is an insulator, so electrons from the negatively charged rod move onto the foam at the touch point and stay localized there. The metal can (not electrically connected through the insulating foam) remains essentially neutral.