A student investigates the energy transfers in a small generator system. She connects the generator to a circuit that includes a resistor. She hangs a mass from a string wound around the axle of the generator. The table below shows the results of her experiment as the mass falls to the ground:
| Measurement | Value |
|---|---|
| Height that mass falls | 0.85 m |
| Mass | 1.80 kg |
| Time taken for mass to fall | 1.5 s |
| Average current in the resistor | 0.35 A |
| Average voltage across the resistor | 9.6 V |
State the equation linking gravitational potential energy (GPE\text{GPE}GPE), mass, ggg, and height.
Calculate the gravitational potential energy (GPE\text{GPE}GPE) lost by the mass. (Take g=10 N/kgg = 10\text{ N/kg}g=10 N/kg or 9.81 N/kg)
Explain why only some of the gravitational potential energy lost by the mass is transferred to the resistor.
Calculate the electrical energy transferred to the resistor.
36 exam-style questions on Edexcel IGCSE Physics Energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.