Ohm's law
Current equals voltage divided
Ohm's law is the principle that electric current through a conductor is directly proportional to voltage and inversely proportional to resistance.
Expressed as V = IR (voltage equals current times resistance), it's fundamental to electrical engineering and circuit analysis.
Using Ohm's law, we calculated the resistance needed for the LED.
Current-limiting circuit element
- impedanceAC circuit opposition
- resistivityMaterial's inherent current opposition
- conductorOne who directs musicians
- insulatorSubstance resisting energy flow
semiconductor · superconductor · wire · gauge · thickness · length · temperature · material
Electromotive force unit
- potentialLatent capacity for development
- electromotive forceEnergy moving charges through circuit
- batteryPortable electricity storage
- power supplyElectrical energy delivery device
voltmeter · millivolt · kilovolt · potential difference · voltage drop · anode · cathode · terminal
Unit of electrical flow
- amperageElectrical flow quantity
- flowUnbroken forward movement
- electronsNegative charges in atoms
- chargeCost or accusation
coulomb · direct current · alternating current · milliamp · microamp · galvanometer · ammeter · multimeter
Mathematical equality assertion
- proportionalityScaling relationship between quantities
- calculationMathematical problem-solving process
- relationshipConnection between entities
- ratioComparative numerical relation
mathematical · derivation · linear · slope · graph · variables · units · conversion
Single-path electrical loop
- parallel circuitShared-voltage electrical arrangement
- closed circuitUninterrupted conductive path
- open circuitIncomplete electrical loop
- short circuitAccidental low-resistance path
schematic · component · node · branch · loop · Kirchhoff · load · switch
Four-digit number
- empiricalBased on observation, not theory
- experimentationSystematic testing of ideas
- discoveryAct of finding something
- physicsScience of matter and energy
scientific method · validation · measurement · galvanic · principle · contribution · recognition
resistor
Current-limiting circuit element
- impedanceAC circuit opposition
- resistivityMaterial's inherent current opposition
- conductorOne who directs musicians
insulator · semiconductor · superconductor · wire · gauge · thickness · length · temperature · material · carbon
volt
Electromotive force unit
- potentialLatent capacity for development
- electromotive forceEnergy moving charges through circuit
- batteryPortable electricity storage
power supply · voltmeter · millivolt · kilovolt · potential difference · voltage drop · anode · cathode · terminal · polarity
ampere
Unit of electrical flow
charge · coulomb · direct current · alternating current · milliamp · microamp · galvanometer · ammeter · multimeter · electron flow
equation
Mathematical equality assertion
- proportionalityScaling relationship between quantities
- calculationMathematical problem-solving process
- relationshipConnection between entities
ratio · mathematical · derivation · linear · slope · graph · variables · units · conversion · problem-solving
series circuit
Single-path electrical loop
- parallel circuitShared-voltage electrical arrangement
- closed circuitUninterrupted conductive path
- open circuitIncomplete electrical loop
short circuit · schematic · component · node · branch · loop · Kirchhoff · load · switch · breadboard
1827
Four-digit number
- empiricalBased on observation, not theory
- experimentationSystematic testing of ideas
- discoveryAct of finding something
physics · scientific method · validation · measurement · galvanic · principle · contribution · recognition
- electricityelectricity, battery, batteries, wire, wires
- electronicscomputer, resistors, capacitors, TVs, TV
- EponymsDarwinian, Alzheimer's disease, Freudian slip, cardigan, Parkinson's disease
- electrical engineeringelectrical engineer, current, circuit design, circuits, voltage
- Formulaschemical formula, quadratic formula, empirical formula, area formula, volume formula
- AC CircuitsAC power, AC voltage, AC generator, impedance, reactance
Ohm's lawsemiconductors
Partially conductive materials
diodes · vacuum tubes · electrolytes · superconductors · insulators