In an electrostatic laboratory demonstration, a student charges a polythene rod and an acetate rod by rubbing them with different dry cloths.
The magnitude of the charge on the polythene rod is 54 nC54\text{ nC}54 nC.
The magnitude of the charge on the acetate rod is 120 nC120\text{ nC}120 nC.
Calculate the percentage of charge on the polythene rod compared with the charge on the acetate rod.
Use the equation:
percentage of charge=charge on polythene rodcharge on acetate rod×100 \text{percentage of charge} = \frac{\text{charge on polythene rod}}{\text{charge on acetate rod}} \times 100 percentage of charge=charge on acetate rodcharge on polythene rod×10047 exam-style questions on Edexcel GCSE Physics 11.1 Charging by friction. Each one has a worked solution and a mark scheme showing where the marks go.