capacitors - 2025 ACF Fall

Tossup

A quantum mechanical effect decreases the strength of these devices when their constituent materials have a low density of states. AC coupling uses these devices as high-pass (-5[1])filters, (10[3])blocking (10[1])direct current. (-5[3])In (10[2]-5[1])[emphasize] series, (10[2]-5[2])the strength of these (-5[1])devices (-5[2])equals the reciprocal (10[8]-5[2])of a (10[1])sum (10[9])of (10[2]-5[2])reciprocals. (10[10]-5[16])Resistance (10[1]-5[5])times (10[1]-5[1])a characteristic (-5[1])quantity (10[2])of these devices (10[2])equals (10[2])the time constant. (10[9]-5[1])An (10[2])inductor (10[1])and one (10[1])of (10[1])these devices (10[2])make an (10[3])oscillating (10[1])circuit. (10[3])A quantity (10[1])named for (10[1])these devices, (10[1])which equals charge (10[1])over voltage, can be increased (10[1])by inserting (10[2])a dielectric (10[1])between two parallel (10[1])plates. (10[5])For 10 points, (10[1])what circuit elements (10[2])that (10[2])store energy in electric (10[1])fields (10[1])name a quantity (-5[1])measured in farads? (10[3])■END■ (10[14]0[5])

ANSWER: capacitors [or parallel-plate capacitors; accept capacitance]

= Average correct buzz position

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Buzzes

Player	Team	Opponent	Position	Value
Advai Srinivasan	UC Irvine	UCLA C	26	-5
Danny Han	Stanford B	Berkeley Boss Bandit	27	10
Annika Larson	Claremont A	UCSD A	27	10
Aarnav Vyas	Illinois Orange	Illinois Urbana	27	10
Sai Subramanian	CWRU A	Louisville D	28	10
Andrew Nucci	UCLA B	UCLA E	30	-5
Denali Tran-Le	McGill B	Ottawa A	30	-5
Bethany Howard	Imperial A	Bristol	30	-5
Matthew Wozniak	Michigan B	WVU A	31	10
Daniel Lu	Washington Pink	Washington Chum	31	10
Isy Simpkins	Durham B	Sheffield B	31	-5
Rohan Soni	UCLA F	UCLA D	32	-5
Leonard Castine	Penn	Vassar A	32	10
Saswat Sasha Tripathi	Chicago A	Purdue C	32	10
Moses Dong	Georgia Tech F	Clemson B	32	-5
Tristan Scarlett	Ottawa D	McGill C	36	-5
Taran Knutson	Michigan A	Michigan C	37	-5
Nathan Whittington	Tennessee A	Vanderbilt B	37	-5
Mia Liu	Berkeley Little Prince	Stanford A	40	-5
Aaryan Sumesh	Berkeley Archer Queen	Berkeley Skeleton King	40	10
Jackson Crickard	Claremont B	Claremont C	40	10
Liam Henderson	McMaster B	Toronto B	40	-5
Ryan Gomes	Florida Tech A	ERAU Daytona A	40	10
Wyatt Johnson	CWRU B	Ohio State B	40	10
Henry Nonnemaker	CWRU C	Michigan State C	40	10
Snehan Saroch	Louisville A	Ohio State C	40	10
Henry Ding	Princeton	Rutgers C	40	10
Allen Xu	Georgia Tech A	Georgia Tech D	40	10
Doug Frederick	Auburn A	Georgia A	42	10
Matthew Stall	CWRU D	WVU B	43	10
Zachary Bornstein	Virginia Tech A	William & Mary A	43	10
Zaid Asif	NYU A	George Mason C	43	10
Davis Johnson	Purdue A	WashU Grizzlers	43	10
Connor King	St. Thomas	Wisconsin B	43	10
Samarth Prajapati	Georgia Tech E	Tennessee B	43	10
Benny Shtutman	South Carolina A	Auburn C	43	10
Andreas Ktori	Durham A	York	43	10
Rory Moloney	Cambridge E	Cambridge A	43	10
Alex Randall	Kentucky	Michigan State B	44	-5
Brian Qian	Illinois Canada	Illinois Champaign	44	-5
Austin Tran	Rose-Hulman A	Purdue B	44	10
Eric Zhu	Cornell D	ESF	44	10
Lorie Au-Yeung	UCSC	Berkeley Mighty Miner	45	-5
Susanna Liao	Waterloo A	Toronto G	45	10
Sicheng Jiang	Toronto H	McMaster C	45	-5
Joseph Strom	Louisville B	Michigan State D	45	-5
Joshua Garner	Ohio State A	Ohio State D	45	10
Cara Leonard	William & Mary C	JMU B	45	-5
Jesse Mindel	NCSU A	Virginia A	45	10
Hudson Kee	William & Mary B	UNC D	45	-5
Cooper Morris	Columbia B	Columbia A	45	-5
Daniel Abrams	Rutgers B	Rutgers A	45	10
Rohit Chintala	Maryland B	NYU C	45	10
Lily Katz	Stony Brook	NYU B	45	10
Andrew Sklar	Vassar B	Lehigh B	45	10
Emily Justak	Indiana B	Chicago B	45	-5
Anurag Shah	Indiana A	Illinois Blue	45	-5
Camden Walker	WashU Grolars	Iowa B	45	-5
Alex Matchinski	Michigan Tech	Iowa State	45	-5
Alex Smits	Wisconsin A	Macalester	45	10
Joyann Hua	British Columbia B	Arizona State B	45	-5
Shaya Farahmand	Georgia Tech B	Clemson A	45	-5
Coy Mier	Auburn B	Sewanne	45	10
Michael Shipman	Cambridge D	Cardiff	45	10
Advaith Jagannath	Cambridge C	Imperial D	45	-5
Oliver West	Cambridge B	LSE	45	-5
Siheon Lee	Imperial C	Warwick	45	-5
Derek Li	Cornell A	Cornell B	45	-5
Charlie Ruff	McGill A	Ottawa B	46	-5
Taylor Smallacombe	VCU A	UNC C	46	-5
Vivian Lu	Wisconsin C	Minnesota	46	-5
Vishrut Pisupati	Imperial B	Birmingham	46	-5
Eli O'Sick Johnson	Binghamton C	RIT A	46	-5
Jonah McGinley	Rochester	RIT B	46	10
Elena Thai	Waterloo C	Brock A	47	-5
Jonas Cross	Tennessee Tech	Emory A	47	10
Logan Van Pelt	Washington Coho	Texas	49	-5
Ethan Ma	Illinois Blue	Indiana A	50	10
Suyog Vibhuti	Washington Steelhead	British Columbia A	50	10
Peyton Legg	UCF A	Florida B	53	10
Towery McNeil	Mississippi State A	Vanderbilt A	53	10
Ethan Ririe	UCSD B	UC Santa Barbara	54	10
Alden Thompson	Carleton A	McGill E	54	10
Taman Truong	USC B	USC A	57	10
Anton Akroush	Michigan State A	Michigan D	57	10
David Black	Illinois Champaign	Illinois Canada	57	10
Bryce Younger	Boise State	Arizona State A	57	-5
Luke Simon	Alberta B	British Columbia C	57	10
Jeremy Scurlock	Chipola College	Montevallo	57	10
Ollie Glin-Conway	Imperial D	Cambridge C	57	10
Anirudh Terdal	LSE	Cambridge B	57	10
Mata Cooper	Southampton	Oxford	57	10
Minh Nguyen	Cornell B	Cornell A	57	10
Ritwik Sharma	Arizona State A	Boise State	58	10
Rafa Travis	Durham C	Durham D	58	10
Ty Brennan	Berkeley Mighty Miner	UCSC	59	10
Anne Fjeld	Alberta A	Washington Chinook	61	10
Carter Yott	McMaster A	Toronto F	62	10
Kevin Cronk	Virginia Tech C	Liberty C	64	10
Christopher Bradley	Southern Connecticut State University A	Boston College B	64	10
Ethen Sun	Toronto C	Toronto E	66	10
Nathan Sprouse	Virginia Tech B	UNC A	66	10
Danny Cutbill	RIT A	Binghamton C	66	10
Eric Morshed	Johns Hopkins	Rutgers D	67	10
Sam Kung	UNC C	VCU A	68	10
Jaie Somaia	Sheffield A	Edinburgh D	68	10
Connor Yu	Cornell C	Binghamton A	68	10
Jackson McDonald	Alabama A	Clemson C	70	10
Steven McPhillimey	Lehigh A	Rowan	72	10
James Xiao	Toronto A	Waterloo B	74	10
Bryce Myers	Stanford A	Berkeley Little Prince	77	10
James Headon	Edinburgh A	Edinburgh C	82	10
John Shelley	Clemson B	Georgia Tech F	84	10
Wesley Stine	Clemson A	Georgia Tech B	84	10
Matthew Bucek	George Mason A	Maryland C	86	10
Alex Dzurick	William Woods University A	Purdue D	89	10
Kenny Ruhland	Florida Tech B	Florida State A	90	10
Kevin Liu	Maryland A	George Mason B	90	10
Drew Wetterlind	Iowa State	Michigan Tech	90	10
Alex Feller	Minnesota	Wisconsin C	90	10
Luke Houtz	Arizona State B	British Columbia B	90	10
Erin Williams	JMU A	Tusculum A	93	10
Aarav Kakad	UCLA C	UC Irvine	96	10
Vishnu Sharma	Texas	Washington Coho	96	10
Eric Lipsutz	Chicago B	Indiana B	97	10
Jolie Yeh	Warwick	Imperial C	97	10
Simon Choist	Queen's A	Toronto I	101	10
Alex Hestermann	Washington Sockeye	Washington Masu	102	10
Will Marcotte	Toronto D	Guelph A	105	-5
Joseph Wang	UCLA E	UCLA B	108	10
Victor Xu	Toronto B	McMaster B	108	10
Andrew Wu	Columbia A	Columbia B	108	10
Nikola Wu	UCLA D	UCLA F	109	10
Abhay Ariyapappillil	Ottawa B	McGill A	109	10
Rebecca Li	Ottawa A	McGill B	109	0
Malcolm Meyn	McGill C	Ottawa D	109	10
Charlie Rickards	Ottawa C	Carleton B	109	10
Ibraheem Alkrahgholy	Guelph A	Toronto D	109	0
Thomas Brittain	McMaster C	Toronto H	109	0
June Miller	Florida A	South Florida A	109	10
Daniel Luebs	Michigan State B	Kentucky	109	0
Reed Sexton	Michigan C	Michigan A	109	10
David Ropp	Duke A	UNC B	109	0
Ezra Zareba	UNC B	Duke A	109	10
Brendan Karg	JMU B	William & Mary C	109	10
Noah Fine	UNC D	William & Mary B	109	10
Yashaswi Jaishy	Iowa B	WashU Grolars	109	10
Brayden Zhang	Vanderbilt B	Tennessee A	109	10
Stephen Donoghue	Sheffield B	Durham B	109	10
Ada Bendel	Bristol	Imperial A	109	10
James Mogg	Birmingham	Imperial B	109	10

Summary

Tournament	Edition	TUH	Conv. %	Neg %	Average Buzz
UK (North)	UK	5	100%	20%	72.00
UK (South)	UK	8	100%	63%	71.75
Northern California	US	4	100%	50%	50.75
Southern California	US	7	100%	43%	70.14
Eastern Canada (1)	US	5	80%	60%	95.25
Eastern Canada (2)	US	9	67%	44%	76.00
Florida	US	4	100%	0%	73.00
Great Lakes	US	11	82%	27%	48.11
Lower Mid-Atlantic	US	9	100%	33%	78.44
Upper Mid-Atlantic	US	1	100%	100%	108.00
Upper Mid-Atlantic	US	9	100%	0%	54.78
Upper Mid-Atlantic	US	2	100%	0%	58.50
Midwest	US	9	100%	44%	60.89
North	US	4	100%	50%	67.00
Northeast	US	1	100%	0%	64.00
Pacific	US	8	100%	38%	68.13
Southeast	US	12	100%	25%	59.75
Upstate NY	US	5	100%	40%	56.20