You take your foot off the accelerator of an electric car. What causes the rapid slowing down?
- A The traditional engine converting kinetic energy into electrical energy
- B The regenerative braking system converting kinetic energy into electrical energy
- C The traditional engine applying the footbrake to save electrical energy
- D The regenerative braking system applying the footbrake to save electrical energy
Why this is the answer
A car with regenerative braking slows down more fiercely than a car with a traditional engine. This is due to the regenerative braking system converting the unwanted kinetic energy into stored electrical energy.
Why the other answers don't fit
- A
- The traditional engine converting kinetic energy into electrical energy — An electric car has no traditional engine to do this.
- C
- The traditional engine applying the footbrake to save electrical energy — The footbrake is operated by the driver, not by the engine.
- D
- The regenerative braking system applying the footbrake to save electrical energy — The system generates electricity rather than pressing the brake pedal for you.
Where this comes from
- Driving: the essential skills — section 3
Rule numbers link to The Highway Code on gov.uk.
Where this question comes from
The question, its options and the explanation are reproduced word for word from the DVSA revision question bank under licence. The licence requires them to appear unaltered, so we cannot reword them and neither can anyone else — that is why you will meet the same wording on other sites. Everything else on this page is written by Theory Hub: the explanation of why each wrong answer is wrong, the topic guide and the revision notes.
Asked in: Driving Instructor (ADI Part 1)
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