Question

A class of these circuit elements called transferred electron devices are used in oscillators to produce microwaves. Quantum tunneling allows a class of these devices named for Leo Esaki (“eh-SAH-key”) to (10[1])exhibit (-5[1])negative resistance. (10[1])Four (10[1])of these devices are arranged in a (-5[1])diamond shape (-5[1])in a (-5[1])bridge rectifier. (-5[1])These devices (10[1])have (10[1]-5[1])an exponential I-V (“eye-vee”) relationship (10[1])according to the Shockley equation. Past the breakdown voltage, these devices can conduct in (-5[1])both directions. On circuit (-5[1])diagrams, these devices are represented by a triangle touching a line. For 10 points, name (10[1])these circuit elements (10[1])that only let current flow in one direction (10[1])and come in a “light-emitting” type. ■END■ (10[3])

ANSWER: diodes [accept light-emitting diodes or Gunn diodes or Esaki diodes; prompt on LEDs]
<Physics>
= Average correct buzz position

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Summary

2024 ACF Fall at CornellfallY978%0%44%76.00
2024 ACF Fall at Ohio StatefallY875%0%50%72.67
2024 ACF Fall at WashingtonfallY6100%0%33%74.00
2024 ACF Fall at GeorgiafallY10100%0%60%80.70
2024 ACF Fall at North CarolinafallY978%0%56%95.43
2024 ACF Fall at Claremont CollegesfallY5100%0%40%67.80
2024 ACF Fall at RutgersfallY8100%0%50%79.38
2024 ACF Fall at RutgersfallY888%0%50%72.57
2024 ACF Fall at IllinoisfallY989%0%44%49.38

Buzzes

PlayerTeamOpponentBuzz PositionValue
Jason Qin (DII)Columbia J (DII)Fordham A2910
Zaid Asif (DII)NYU A (UG)Penn B (DII)30-5
Derek Chen (UG)Columbia A (UG)Penn A (DII)3210
Lucas Shedlock (UG)Princeton A (UG)NYU B3310
Neilesh Shroti (UG)Columbia BColumbia A (UG)40-5
Jason Lee (DII)Rutgers A (UG)Columbia B42-5
Sidhant Chaliha (DII)Princeton A (UG)Maryland B (DII)44-5
Vinayak Singh BhadoriyaNYU BBard A (UG)46-5
Ishan Joshi (DII)Rutgers BRowan A (DII)4810
Vincent Zhang (DII)Penn A (DII)Fordham A4910
Zaid Asif (DII)NYU A (UG)Maryland A (DII)49-5
Daniel CraigRutgers BLehigh B (DII)5310
Kevin Liu (DII)Maryland B (DII)Lehigh B (DII)67-5
Leonard Castine (DII)Penn B (DII)Rutgers A (UG)71-5
Steven McPhillimey (UG)Lehigh A (UG)Bard A (UG)8610
Leonard Castine (DII)Penn B (DII)NYU A (UG)8910
Rohit Chintala (DII)Maryland B (DII)Princeton A (UG)9710
Claire Wilson (UG)Lehigh A (UG)Rowan A (DII)10410
Jack Stuhlman (DII)Lehigh B (DII)Maryland B (DII)10410
Andrew YangColumbia BRutgers A (UG)10410
Olin Bose (DII)Columbia A (UG)Columbia B10510
Andy Yu (DII)Maryland A (DII)NYU A (UG)10510
Jason Lee (DII)Rutgers A (UG)Penn B (DII)10510