A student is designing an investigation of the distribution of charges in conductors. She will use two conducting spheres mounted on insulating stands in the investigation. The conducting spheres are shown.



What should the student do in her investigation to produce a separation of charges in the spheres as shown?

Responses

She should place a positively charged rod near the left sphere.
She should place a positively charged rod near the left sphere.

She should place a negatively charged rod near the left sphere.
She should place a negatively charged rod near the left sphere.

She should place two positively charged rods near each sphere.
She should place two positively charged rods near each sphere.

She should place two negatively charged rods near each sphere.
She should place two negatively charged rods near each sphere.

The correct response is: "She should place a positively charged rod near the left sphere and a negatively charged rod near the right sphere."