Steel paperclips are picked up by a permanent magnet.
The magnet is removed and the paperclips are placed on a wooden desk.
A plastic pen is rubbed with a woollen cloth and held just above the paperclips.
Some of the paperclips jump and stick to the pen.
Which statement correctly explains this last observation?
The pen has been electrically charged by rubbing with the cloth.
The pen has been magnetised by rubbing with the cloth.
The paperclips have been electrically charged by the magnet.
The paperclips have been magnetised by the magnet.
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.