A suspended, lightweight metal sphere is attracted to a negatively charged rod. Which of the following statements about the charge on the sphere is correct?
It must carry a positive charge.
It must carry a negative charge.
It could carry a positive charge or be neutral.
It could carry a negative charge or be neutral.
145 exam-style questions on CIE IGCSE Physics 4.2.1a Positive and negative charge. Each one has a worked solution and a mark scheme showing where the marks go.