A positively charged glass rod is brought near to an isolated, uncharged metal sphere and held there. What happens when the metal sphere is earthed?
Electrons flow from the earth to the metal sphere.
Electrons flow from the metal sphere to the earth.
Positive charge flows from the earth to the metal sphere.
Positive charge flows from the metal sphere to the earth.
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.