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1A machine for converting mechanical energy into electrical energy, typically by means of rotating coils of copper wire in a magnetic field.
- ‘Hybrids work by using the braking power to spin a dynamo which charges a battery.’
- ‘As well as a body made from dent-resistant plastic, it has regenerative brakes: pressing the pedal works like a dynamo, recharging the engine.’
- ‘It worked under the same principle as a dynamo, where a moving wire in a magnetic field would create electricity.’
- ‘This he established in 1836, using it to give details of his electromagnets and their application in motors and dynamos.’
- ‘The Englishman Michael Faraday built the first dynamo, capable of turning mechanical energy into electricity, only 173 years ago.’
- ‘The petrol engine turned a dynamo that produced electricity to drive the two electric motors.’
- ‘Despite several eminent scientists predicting that electric light bulbs in a circuit would never work, a lamp powered by current produced by dynamos was demonstrated on 21 October 1879.’
- ‘Thus he was able to convert mechanical energy into electrical energy and discover the first dynamo.’
- ‘Faraday fooled around with wires and magnets and batteries, making the first electric motors and dynamos.’
- ‘When he walks, the rotor of the dynamo rotates generating electricity and rechargeable batteries could be charged.’
- ‘When the cars slow down, their energy is captured in dynamos that recharge the battery, rather than being wasted simply heating brake pads.’
- ‘In calm weather, the gases would explosively recombine in combustion engines turning dynamos.’
- ‘Using a second-hand oil engine and a small dynamo, he lit up the family home with low-power bulbs.’
- ‘Arguably the autocar laid the foundations for many of today's trains - using a petrol engine to drive a dynamo to power electric motors.’
- ‘Those are the brakes that act as dynamos, charging you up whenever you slow down.’
- ‘The seabed generators consist of an array of massive propellers that are spun around as the tidal flow rushes past and drive a dynamo that produces energy.’
- ‘In the case of a dynamo, cyclists have no lights when stationary but probably good lighting when moving.’
- ‘His uncle had patents on dynamos and electrical meters.’
- ‘That same polarity functions in an inorganic realm in the principle of the dynamo, where the relative motion of iron and copper generates electricity.’
- ‘A dynamo converts mechanical energy from a moving electrical conductor into electromagnetic energy and thus generates current.’
- 1.1informal An extremely energetic person.‘she was a dynamo in London politics’
- ‘She is an intellectual dynamo and long-time friend.’
- ‘The U.S. dynamo wins his fifth gold medal in the men's 100-meter butterfly.’
- ‘The goalie in the second game was a little dynamo - dashing with great speed and grace.’
- ‘A vivacious dynamo of energy and ambition, she would be the last person to seek the title of saviour of the film industry north of the Border.’
- ‘Like most 6-year-olds, Mitchie is a dynamo of energy and motion.’
- ‘The young dynamo came home in first place in Class 6 and finished 18th overall.’
- ‘Ben Vereen is nothing short of masterful, a dynamo of energy and enthusiasm that carries the show from beginning to end.’
- ‘He is a whirling dynamo when it comes to jumping, spinning kicks.’
- ‘She was always a little dynamo, more than willing to jump in and lend a hand, always had a smile on her face.’
- ‘His experience has made him a dynamo within the company and throughout the industry.’
- ‘Some of my gang got up to £120 a day,’ explains the fast-talking, self-styled dynamo.’
- ‘Brigid Fitzgerald who has been a dynamo of community development for many years acted as MC for the evening.’
- ‘She had both a heart and a lung transplanted, and she was an absolute dynamo.’
- ‘The four organizers of Expozine are dynamos of productivity.’
- ‘I don't care what anyone says, that girl is a dynamo on stage.’
- ‘He's like this dynamo, full of energy and positivity.’
- ‘Sherman Spencer again proved to be a real dynamo in the forwards with his five goal haul.’
- ‘His mother, nearly eighty years old but still a dynamo of energy and faith, has raised fourteen children.’
- ‘The midfield dynamo with the energy and face of a terrier said this spring that the mood around the team was ‘miserable’.’
- ‘He's an extraordinary musician and just a dynamo to work with.’
Late 19th century: abbreviation of dynamo-electric machine, from Greek dunamis ‘power’.
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