passivity - 2026 ACF Regionals

Packet J: Bonus 15

From symmetry arguments, Leon Chua proposed the memristor as the 4th fundamental circuit element with this property. For 10 points each:

[10h] Name this property of circuit elements like the capacitor and inductor, which dissipate energy without producing any.

ANSWER: passivity [or passive elements or passive components]

[10e] The other passive circuit element is this element, whose strength is indicated by a series of 3 to 6 colored bands, and is measured in ohms.

ANSWER: resistors

[10m] Passive circuit elements pass through the origin and occupy only the first and third quadrants of these plots. An ideal resistor traces out a straight line with slope equal to resistance on these curves.

ANSWER: I–V curves [or current–voltage characteristic curves; or characteristic curves]

<GC, Physics> | Packet J - Southampton A, Indiana A, Illinois B, Edinburgh A

Heard	PPB	E %	M %	H %
63	13.33	97%	29%	8%

Back to bonuses

Conversion

Team	Opponent	Part 1	Part 2	Part 3	Total	Parts
Alabama A	Louisville B	0	10	10	20	EM
Arizona State	UCLA B	0	10	0	10	E
Berkeley A	Berkeley B	0	10	0	10	E
Berkeley C	Berkeley D	0	10	10	20	EM
Brandeis A	Dartmouth A	0	10	0	10	E
Bristol	Edinburgh B	0	10	0	10	E
Brock	McGill B	0	10	0	10	E
Brown	Dartmouth B	0	10	10	20	EM
CWRU A	Michigan C	0	10	10	20	EM
CWRU B	Pittsburgh	0	10	0	10	E
Cambridge C	LSE	0	10	10	20	EM
Chicago A	Chicago E	0	10	0	10	E
Chicago C	Purdue B	0	10	0	10	E
City St. George's	Cambridge B	0	0	0	0
Claremont	Washington B	0	10	10	20	EM
Columbia B	NYU B	0	10	10	20	EM
Columbia C	Rutgers B	0	10	0	10	E
Durham	Oxford B	10	10	10	30	HEM
Florida A	Central Florida A	0	10	0	10	E
Florida B	Central Florida C	0	10	0	10	E
Georgetown	Swarthmore	0	10	0	10	E
Georgia Tech A	Minnesota A	0	10	0	10	E
Georgia Tech B	Georgia Tech C	0	10	0	10	E
Georgia Tech D	Tennessee A	0	10	0	10	E
Guelph	Toronto E	0	10	0	10	E
Harvard A	Southern Connecticut State	0	10	0	10	E
Harvard B	Brandeis B	0	10	0	10	E
Illinois A	Chicago B	0	10	0	10	E
Imperial A	UCL	10	10	10	30	HEM
James Madison A	Virginia	0	10	0	10	E
John Jay	Johns Hopkins B	0	10	0	10	E
Johns Hopkins A	Columbia A	10	10	0	20	HE
Kentucky	WashU B	0	10	10	20	EM
Louisville A	Vanderbilt B	0	10	0	10	E
MIT	Yale	0	10	10	20	EM
Maryland B	Catholic	0	10	0	10	E
Maryland C	Rutgers A	0	10	0	10	E
McMaster A	Queen's	0	10	0	10	E
Michigan State	Michigan B	0	10	10	20	EM
NYU A	Maryland A	0	10	0	10	E
North Carolina A	Duke	0	10	0	10	E
Northwestern B	Indiana B	0	10	0	10	E
Northwestern C	Notre Dame A	0	10	0	10	E
Ohio State A	Ohio State C	0	10	0	10	E
Ohio State B	Michigan A	0	10	0	10	E
Oxford A	Imperial C	0	10	0	10	E
Penn State	RIT	0	10	0	10	E
Purdue A	Notre Dame B	0	10	10	20	EM
Stanford B	Stanford A	10	10	10	30	HEM
Texas B	Texas A	0	10	0	10	E
Toronto B	Ottawa	0	10	0	10	E
Toronto C	Simon Fraser	0	10	0	10	E
Toronto Metropolitan	Toronto D	0	10	0	10	E
UBC A	Waterloo A	0	10	0	10	E
UBC B	Carleton University	0	10	10	20	EM
UC Irvine	UCLA A	0	10	0	10	E
UCSD A	UCSD B	0	10	10	20	EM
VCU	William and Mary	0	0	0	0
Virginia Tech A	North Carolina C	10	10	0	20	HE
Virginia Tech B	South Carolina A	0	10	0	10	E
WashU A	Bruin	0	10	10	20	EM
Waterloo B	McGill A	0	10	10	20	EM
Western C	Toronto G	0	10	0	10	E

Summary

Tournament	Edition	Match	Heard	PPB	E %	M %	H %
California (North)	Main Site	✓	3	20.00	100%	67%	33%
California (South)	Main Site	✓	3	13.33	100%	33%	0%
Canada	Main Site	✓	10	12.00	100%	20%	0%
Florida	Main Site	✓	2	10.00	100%	0%	0%
Great Lakes	Main Site	✓	5	14.00	100%	40%	0%
Lower Mid-Atlantic	Main Site	✓	5	10.00	80%	0%	20%
Midwest	Main Site	✓	6	11.67	100%	17%	0%
Northeast	Main Site	✓	5	14.00	100%	40%	0%
Overflow	Main Site	✓	2	15.00	100%	50%	0%
South Central	Main Site	✓	1	10.00	100%	0%	0%
Southeast	Main Site	✓	6	15.00	100%	50%	0%
UK	Main Site	✓	6	16.67	83%	50%	33%
Upper Mid-Atlantic	Main Site	✓	8	12.50	100%	13%	13%
Upstate NY	Main Site	✓	1	10.00	100%	0%	0%