passivity - 2026 ACF Regionals

Question

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>

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Summary


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

Data


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