There is a current in a resistor. The resistor becomes warm.
Which statement explains the energy transfer?
Charge is used up in the resistor, which increases its thermal store
Current is changed into heat in the resistor, so less current leaves it
Charge flowing in the resistor increases the chemical store of the resistor
Work is done as charge flows through the resistor, increasing its thermal store
44 exam-style questions on OCR GCSE Physics 7.1 Work done, covering 7.1.1 Conservation of energy in a closed system, 7.1.2 Energy stores and transfers, 7.1.3 Energy changes by heating, forces and current, 7.1.4 Quantifying energy transfers in a system, and 7.1.5 Kinetic, elastic and gravitational potential energy. Each one has a worked solution and a mark scheme showing where the marks go.