Kirchhoff's First Law

EmmyBen
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EmmyBen
Created by EmmyBen over 5 years ago
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Kirchhoff's First Law
1 The sum of the currents entering any junction is always equal to the sum of the currents leaving the junction.
1.1 If they don't add up: ammeters may have bit of resistance, rounding errors
2 Electron flow: negative to positive Conventional current: positive to negative
2.1 Conventional - incorrect
3 Measuring current: flow of electrons
3.1 Voltage = resistance x current
3.1.1 Higher the resistance, smaller the current
3.1.1.1 Adding ammeter changes resistance - changes current
3.1.1.1.1 Ideal ammeter has 0 resistance
3.1.1.1.2 Ammeters added in series

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