Several cylindrical resistors are manufactured from the same uniform metal. Two different lengths of resistor are available, and each length is available in two different cross-sectional areas.
Which resistor has the lowest electrical resistance?
the resistor with the greater length and the larger cross-sectional area
the resistor with the greater length and the smaller cross-sectional area
the resistor with the smaller length and the larger cross-sectional area
the resistor with the smaller length and the smaller cross-sectional area
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.