In an electric circuit, a metal wire is connected across a direct current (d.c.) power supply. Which statement correctly describes the flow of electrons and conventional current in the wire?
Electrons flow from the negative terminal to the positive terminal, which is the same direction as conventional current.
Electrons flow from the negative terminal to the positive terminal, which is opposite to the direction of conventional current.
Electrons flow from the positive terminal to the negative terminal, which is the same direction as conventional current.
Electrons flow from the positive terminal to the negative terminal, which is opposite to the direction of conventional current.
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.