A student holds a rod in their hand and rubs it with a cloth. After rubbing, the rod gains a negative charge.
Which row in the table correctly identifies a possible material for the rod and the charge transfer that occurred?
Material of rodTransfer of chargeAmetalnegative charge from cloth to rodBplasticnegative charge from cloth to rodCmetalpositive charge from rod to clothDplasticpositive charge from rod to cloth \begin{array}{|c|c|l|} \hline & \text{Material of rod} & \text{Transfer of charge} \\ \hline \text{A} & \text{metal} & \text{negative charge from cloth to rod} \\ \hline \text{B} & \text{plastic} & \text{negative charge from cloth to rod} \\ \hline \text{C} & \text{metal} & \text{positive charge from rod to cloth} \\ \hline \text{D} & \text{plastic} & \text{positive charge from rod to cloth} \\ \hline \end{array} ABCDMaterial of rodmetalplasticmetalplasticTransfer of chargenegative charge from cloth to rodnegative charge from cloth to rodpositive charge from rod to clothpositive charge from rod to clothMetal; negative charge from cloth to rod
Plastic; negative charge from cloth to rod
Metal; positive charge from rod to cloth
Plastic; positive charge from rod to cloth
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.