{"query": "A 12-volt circuit: the current it draws, the power it burns", "count": 20, "results": [{"id": "card_works_ohms_law", "title": "A 12-volt circuit: the current it draws, the power it burns", "shelf": "the-works", "surface": "secular", "snippet": "Ohm's law ties voltage, current and resistance; the power law says how much heat that makes. 12 V across 6 Ω draws 2 A and dissipates 24 W — the power line standing on Ohm's.  Worked & sealed by the e", "authority_tier": "verified", "source": "The Works — worked & sealed", "readable": false, "generated": false}, {"id": "card_power_basics", "title": "Volts, amps, watts — the words you need", "shelf": "energy", "surface": "secular", "snippet": "Three words run everything. VOLTS (V) are the push (like water pressure); AMPS (A) are the flow (like the current in a pipe); WATTS (W) are the actual power, and Watts = Volts × Amps. Energy over time", "authority_tier": "reference", "source": "Basic electrical law (Ohm's law; power = volts × amps) — public fact", "readable": false, "generated": false}, {"id": "card_src_etym_volt", "title": "volt", "shelf": "etymology", "surface": "secular", "snippet": "volt: etymology (Webster 1913) — n.: [F. volte; cf. It. volta. See Vault.]; n.: [After Alessandro Volta, the Italian electrician.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_vault", "title": "vault", "shelf": "etymology", "surface": "secular", "snippet": "vault: etymology (Webster 1913) — n.: [OE. voute, OF. voute, volte, F. voûte, LL. volta, for voluta, volutio, fr. L. volvere, volutum, to roll, to turn about. See Voluble, and cf. Vault a leap, Volt a", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_comms_power_field", "title": "Powering a radio in the field", "shelf": "communications", "surface": "secular", "snippet": "Comms fail when the batteries do, so plan power like water. Handhelds sip current on RECEIVE and gulp on TRANSMIT — listen more, key up briefly, and turn power DOWN when the other station is close (lo", "authority_tier": "reference", "source": "U.S. Army field antenna & signaling references (public domain)", "readable": false, "generated": false}, {"id": "card_src_etym_lavolt_lavolta", "title": "lavolt; lavolta", "shelf": "etymology", "surface": "secular", "snippet": "lavolt; lavolta: etymology (Webster 1913) — n.: [It.la volta the turn, turning, whirl. Cf. Volt of a horse, Volta.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_volta", "title": "volta", "shelf": "etymology", "surface": "secular", "snippet": "volta: etymology (Webster 1913) — n.: [It. volta a turn, turning, a time. See Volt a tread.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_spine_power", "title": "The off-grid power shelf — keeping the lights and the radio on", "shelf": "spine", "surface": "secular", "snippet": "Off-grid electricity for the prepared home and the mesh node: volts/amps/watts, sizing a system to your real load, batteries (lead-acid vs lithium), solar panels and charge controllers, inverters, saf", "authority_tier": "reference", "source": "The off-grid power shelf (curated, public domain)", "readable": false, "generated": false}, {"id": "card_power_keep_devices_alive", "title": "Keeping phones, radios, and lights alive", "shelf": "energy", "surface": "secular", "snippet": "When power is scarce, discipline stretches it far. Charge small devices from 12 V or USB directly (a car socket or a small solar/USB panel), skipping the inverter's losses. Keep a couple of charged PO", "authority_tier": "reference", "source": "U.S. Department of Energy / NREL consumer energy guidance (public domain)", "readable": false, "generated": false}, {"id": "card_src_openstax_physics_section_summary_c02519d3", "title": "Section Summary — Physics", "shelf": "physics", "surface": "secular", "snippet": "Section Summary\n\n19.1\n\nOhm's law\n\nDirect current is constant over time; alternating current alternates smoothly back and forth over time.\n\nElectrical resistance causes materials to extract work from t", "authority_tier": "reference", "source": "OpenStax: Physics (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_university_physics_volume_2_key_terms_7b2da692", "title": "Key Terms — University Physics Volume 2", "shelf": "physics", "surface": "secular", "snippet": "Key Terms\n\nammeter\ninstrument that measures current\n\nelectromotive force (emf)\nenergy produced per unit charge, drawn from a source that produces an electrical current\n\nequivalent resistance\nresistanc", "authority_tier": "reference", "source": "OpenStax: University Physics Volume 2 (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_word_volt_ampere", "title": "volt-ampere", "shelf": "dictionary", "surface": "secular", "snippet": "volt-ampere: (noun) a unit of electrical power in an AC circuit equal to the power dissipated when 1 volt produces a current of 1 ampere — syn: var", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_var", "title": "var", "shelf": "dictionary", "surface": "secular", "snippet": "var: (noun) a unit of electrical power in an AC circuit equal to the power dissipated when 1 volt produces a current of 1 ampere — syn: volt-ampere", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_volt", "title": "volt", "shelf": "dictionary", "surface": "secular", "snippet": "volt: (noun) a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt; equivale", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_voltage", "title": "voltage", "shelf": "dictionary", "surface": "secular", "snippet": "voltage: (noun) the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts — syn: electromotive force, emf · (noun) the difference in electric", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_fed_tm5_5052", "title": "TM 5-5052 Generator Set, Portable, Diesel, Skid-Mounted, 100 To 106-KW, 127/220-Volt, 3-Phase, 60-Cycle Or 230/400-Volt, 3-Phase, 50-Cycle, Murphy, Model ME-650 Maintenance Instruc", "shelf": "practical", "surface": "secular", "snippet": "TM 5-5052 Generator Set, Portable, Diesel, Skid-Mounted, 100 To 106-KW, 127/220-Volt, 3-Phase, 60-Cycle Or 230/400-Volt, 3-Phase, 50-Cycle, Murphy, Model ME-650 Maintenance Instructions And Parts Cata", "authority_tier": "reference", "source": "US War Department field & technical manuals (PD, 17 USC 105)", "readable": true, "generated": false}, {"id": "card_src_pron_volts", "title": "volts", "shelf": "pronunciation", "surface": "secular", "snippet": "volts: pronounced (ARPABET) V OW1 L T S. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_pron_volt", "title": "volt", "shelf": "pronunciation", "surface": "secular", "snippet": "volt: pronounced (ARPABET) V OW1 L T. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_fed_tm5_5031", "title": "TM 5-5031 Generator set, electric, portable, gasoline-driven, skid-mounted, liquid-cooled, 5-KW, 120 volts, 2-wire, direct current, Hollingsworth models CE-51-DC and CE-51-DC/WK2", "shelf": "practical", "surface": "secular", "snippet": "TM 5-5031 Generator set, electric, portable, gasoline-driven, skid-mounted, liquid-cooled, 5-KW, 120 volts, 2-wire, direct current, Hollingsworth models CE-51-DC and CE-51-DC/WK2. A United States fede", "authority_tier": "reference", "source": "United States military field manuals (PD, 17 USC 105)", "readable": true, "generated": false}, {"id": "card_src_book_39714", "title": "D.C. Powered Timing Light Model 161.2158 for 12 Volt Ignition Systems Sears Owners Manual — Roebuck and Company Sears", "shelf": "gutenberg", "surface": "secular", "snippet": "D.C. Powered Timing Light Model 161.2158 for 12 Volt Ignition Systems Sears Owners Manual, by Roebuck and Company Sears. Subjects: Automobiles -- Motors -- Testing -- Equipment and supplies; Automobil", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}], "house": {"door": "FIND", "kind": "cards", "trail": "results", "seal": null, "next_step": {"do": "open the top card", "door": "FIND", "tool": "card_get", "params": {"id": "card_works_ohms_law"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}