A positively charged cloud passes over a tall steel-framed building. A charge is induced on the building by the cloud because charge carriers (electrons) flow through the building.
What charge is induced on the building and in which direction do the charge carriers (electrons) move?
positive induced charge, electron flow from the building to earth
positive induced charge, electron flow from earth to the building
negative induced charge, electron flow from the building to earth
negative induced charge, electron flow from earth to the building
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.