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WikiCards · Card list · Science cards · Eddy current brake
Uncommon card · Science
Eddy current brake, an Uncommon card
An eddy current brake, also known as an induction brake, Faraday brake, electric brake or electric retarder, is a device used to slow or stop a moving object by generating eddy currents and thus dissipating its kinetic energy as heat.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 64
- DEF
- 39
- Power
- 103
- Wikipedia reads a year
- 30,000
Power 103 (ATK + DEF): stronger than 45 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- Unlike friction brakes, where the drag force that stops the moving object is provided by friction between two surfaces pressed together, the drag force in an eddy current brake is an electromagnetic force between a magnet and a nearby conductive object in relative motion, due to eddy currents induced in the conductor through electromagnetic induction.
- A conductive surface moving past a stationary magnet develops circular electric currents called eddy currents induced in it by the magnetic field, as described by Faraday's law of induction.
- By Lenz's law, the circulating currents create their own magnetic field that opposes the field of the magnet.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Eddy current brake article was read about 30,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 64 and blocks with 39: each hit it takes is cut by 16 %.
How to get Eddy current brake
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below Eddy current brake in the power ranking, all domains together.
- Doi InthanonUncommon · Nature · ATK 55 DEF 48
- Ammonium acetateUncommon · Science · ATK 53 DEF 50
- Chargaff's rulesUncommon · Nature · ATK 63 DEF 40
- Floating-point unitUncommon · Science · ATK 63 DEF 40
- HummockUncommon · Nature · ATK 54 DEF 49
- Cube rootUncommon · Science · ATK 60 DEF 43
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Eddy current brake (revision), CC BY-SA 4.0. Photo : Sebastian Terfloth User:Sese_Ingolstadt, CC BY-SA 3.0, Wikimedia Commons.
