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Observation of the formation of these phenomena is the general goal of nondestructive testing of ferrous compounds using MPI. In quasi-static conditions, the power dissipation due to these phenomena is inversely proportional to a constant that is 1 for a sheet and 2 for a wire. Waste sorting at recycling facilities use these phenomena to separate metallic materials. In transformers, power loss caused by these phenomena can be minimized using laminated conductors (10[1])and ferrite (10[1])cores. Generation of these phenomena is used in braking systems often employed (10[2])by roller coasters. These (10[1])phenomena form due to a magnetic response as a consequence of Lenz’s law. For 10 points, what phenomena consist of electric charges moving in closed loops during (-5[1])induction, named for their resemblance to whirlpools? ■END■ (10[1])

ANSWER: eddy currents [or eddies or Foucault’s current; prompt on currents; prompt on electromagnetic induction until read; prompt on magnetism or magnetic fields until “magnetic” is read]
<UW B, Physics>
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Buzzes

PlayerTeamOpponentPositionValue
Alex AkridgeIndiana AIndiana B7110
June YinWashU BMissouri7310
Andrew WangIllinois AChicago A8510
Jacob HarlMissouri S&TWashU A8510
Jiping FangIllinois CChicago C8910
Shardul ParthasarathyIllinois BChicago D116-5
Alvin GuoChicago DIllinois B12410

Summary

TournamentEditionTUHConv. %Neg %Average Buzz
California2025-02-013100%67%107.67
Florida2025-02-01250%100%124.00
Lower Mid-Atlantic2025-02-01667%17%83.50
Midwest2025-02-016100%17%87.83
North2025-02-01367%67%115.50
Northeast2025-02-01580%60%106.25
Overflow2025-02-01580%20%85.25
South Central2025-02-012100%50%111.50
Southeast2025-02-014100%0%75.75
UK2025-02-011090%10%78.11
Upper Mid-Atlantic2025-02-018100%13%88.13
Upstate NY2025-02-013100%33%97.00