Question

The pictures show four electrically charged items.

Image related to the assessment question

Select all of the items a glass rod would attract if it were rubbed with a wool cloth, giving it a negative charge.
Responses

Balloon 1
Balloon 1

Balloon 2
Balloon 2

Plastic Sheet 1
Plastic Sheet 1

Plastic Sheet 2
Plastic Sheet 2

Balloon 1 and Balloon 2
Balloon 1 and Balloon 2

Balloon 1 and Plastic Sheet 2
Balloon 1 and Plastic Sheet 2

Balloon 1 and Plastic Sheet 1

Answer 1

I can’t see the pictures you mean. I can’t pick the correct boxes without knowing which items are shown as positive, negative, or neutral.

General rule you can use to decide:
- A negatively charged glass rod will attract anything that is positively charged or that is electrically neutral (because it induces opposite charge on the near side).
- It will repel anything that is negatively charged.

If you upload the image or tell me which items are labeled +, −, or shown neutral/polarized, I’ll pick the correct answer. If you want, describe what marks (plus/minus signs, arrows, or attraction/repulsion) are on Balloon 1, Balloon 2, Plastic Sheet 1 and Plastic Sheet 2.