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.
What will happen to the negatively charged electrons when the rod touches the foam cup?
(1 point)
Responses
The electrons will transfer from the cup to the metal can, causing both cup and can to have a positive charge.
The electrons will transfer from the cup to the metal can, causing both cup and can to have a positive charge.
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 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 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 cup and can to have a positive charge.
To determine what will happen to the negatively charged electrons when the rod touches the foam cup, we need to consider the properties of charges and conductors.
When a negatively charged rod touches a conductor, such as the metal can, electrons (which have a negative charge) can move from the rod to the conductor. This happens because electrons repel each other, so when the negatively charged rod comes into contact with the conductor, some electrons on the conductor move away.
In this case, the metal can is the conductor, so when the negatively charged rod touches the foam cup, electrons from the cup will transfer to the metal can. This transfer of electrons will cause both the cup and the can to have a negative charge.
Therefore, the correct answer is:
The electrons will transfer from the cup to the metal can, causing both the cup and can to have a negative charge.