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### 12 Cards in this Set

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• Back
 EMF/voltage definition? unit? symbol? def: electrical pressure that comes from a source like a battery unit: volts (V) symbol: E resistance definition? unit? symbol? def: obstacle in circuit that impedes current unit: ohms (up-side-down horseshoe) symbol: R current definition? unit? symbol? def: rate of electrons flowing through circuit unit: amperes (A) symbol: I power definition? unit? symbol? def: total electrical pressure dissipated by the resistor unit: Watts (W) symbol: P formula relating voltage to current and resistance? E = I / R formula relating power to current and voltage? P = E * I conductance definition? unit? symbol? def: resistance of parallel resisters; reciprocal of resistance unit: siemens (S) symbol: G formula relating power to current and resistance? P = I^2 * R formula relating power to voltage and resistance? P = E^2 / R formula relating conductance to resistance? G = 1 / R formula relating total resistance of circuit (R) to series resistors (R1, R2, etc.)? R = R1 + R2 + R3... formula relating total resistance of circuit (R) to parallel resistors (R1, R2, etc.)? R = 1 / [1 / R1 +1 / R2 +1 / R3...]