Small steel pins are lying on a wooden desk.
A plastic rod is rubbed with a dry silk cloth and held just above the steel pins.
Some of the pins jump and stick to the plastic rod.
Which statement correctly explains this observation?
The plastic rod has been magnetised by rubbing with the cloth.
The plastic rod has been electrically charged by rubbing with the cloth.
The steel pins have been magnetised by the wooden desk.
The steel pins have been electrically charged by the wooden desk.
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.