Subjects
Choose questions individually, practise online, or create a worksheet with matching answers. Counts include generated variants, not only authored originals.
Electric current
Electric current: The rate at which electric charge passes a point.
Potential difference
Potential difference: Energy transferred per unit charge between two points.
Resistance
Resistance: The ratio of potential difference to current for the stated operating conditions.
Series circuit
Series circuit: A circuit arrangement with components connected along one current path.
Parallel circuit
Parallel circuit: A circuit arrangement with branches connected across the same two nodes.
Closed circuit
Closed circuit: A complete conducting path that permits a steady current when driven by a source.
Applies to an ohmic component under constant physical conditions.
Grades 8–12For a steady DC circuit, multiply voltage by current.
Grades 9–12The same current passes through ideal series components.
Grades 9–12The equivalent resistance is less than either positive branch resistance.
Grades 10–12This relation uses constant current in amperes and time in seconds.
Grades 8–12Rules, conditions and small examples in one printable reference.
Grades 8–8Rules, conditions and small examples in one printable reference.
Grades 9–10Rules, conditions and small examples in one printable reference.
Grades 11–1220 key concepts, retrieval questions and a learning checkpoint.
Grades 7–12Voltage is measured across a component; current is measured through a path. Never practise these concepts on household mains wiring.
Grades 7–12The simple questions assume ideal wires and components with the stated resistance.
Grades 8–12The simple questions assume ideal wires and components with the stated resistance.
Grades 8–12