A-LevelPhysicsWork, energy and power9702/12 · May/June 2020 · Q141 Mark

During an interval of time, fuel supplies energy X to a car. Some of this energy is converted into kinetic energy as the car accelerates. The rest of the energy Y is lost as thermal energy. What is the efficiency of the car?

AX / (X - Y)

BY / (X - Y)

C(X - Y) / X

D(X - Y) / Y

✓ Correct answer

C: (X - Y) / X

Oracle Prep sorts past-paper questions by topic, so you can drill Work, energy and power and see which topics are most likely to come up next.

Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2020 Paper 1 Variant 2, question 14.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

The battery of a small tablet computer is initially uncharged. It is connected to a constant 10W power supply for 2.0…

Which relationship is used in the derivation of the equation shown? power = force × velocity

A turbine at a hydroelectric power station is situated at a vertical distance of 30 m below the level of the surface …

The electric current in a wire may be calculated using the equation I = Anvq. Which statement is not correct?

A wire of cross-sectional area 5.0 × 10⁻⁶ m² is made of a metal of resistivity 50 × 10⁻⁸ Ω m. The potential differenc…

A neutron ¹₀n is fired at a ²³⁵₉₂U nucleus. The neutron is absorbed by the nucleus which then splits to form nuclei o…