A positively charged rod is brought near to an uncharged metal sphere. A net negative charge develops on the surface of the metal sphere closest to the positively charged rod.
Why does this happen?
Electrons in the sphere are attracted by the positively charged rod.
Electrons in the sphere are repelled by the positively charged rod.
Positive charges in the sphere are attracted by the positively charged rod.
Positive charges in the sphere are repelled by the positively charged rod.
452 exam-style questions on CIE IGCSE Physics 4.2 Electrical quantities, covering 4.2.1a Positive and negative charge, 4.2.1b Charging by friction and detecting charge, 4.2.1c Electrical conductors and insulators, 4.2.1d Electric fields and electric field patterns, 4.2.2a Electric current, charge and measuring current, 4.2.2b Conduction in metals and the direction of current, 4.2.2c Direct current and alternating current, 4.2.3a Electromotive force, 4.2.3b Potential difference and voltmeters, 4.2.4a Resistance, 4.2.4b Resistance of a metallic wire, 4.2.4c Current–voltage graphs, and 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.