Conservation of Energy and Charge in Circuits 3.0 / 5 based on 2 ratings ? PhysicsWork, Energy, PowerASAll boards Created by: ChloeGoslingCreated on: 04-01-13 14:12 What is Kirchoffs first law? The total current entering a junction = the total current leaving it. (Charge doesn't get used up or lost) 1 of 6 What is Kirchoffs second law? The total e.m.f around a series circuit = the sum of the p.d's across each component. 2 of 6 Equation for sum of resistors in a series circuit Rtotal= R1 + R2 + R3 3 of 6 Equation for sum of resistors in a parallel circuit 1/Rtotal = 1/R1 + 1/R2 + 1/R3 4 of 6 If R1=15Ω R2=20Ω R3=12Ω in a parallel circuit what is the total resistance? 1/Rtotal = 1/15 + 1/20 + 1/12 =1/5 so Rtotal = 5/1 Ω = 5Ω 5 of 6 If R1=5Ω R2=10Ω in a series circuit what is the total resistance? Rtotal = 5 + 10 = 15Ω 6 of 6

## Comments

No comments have yet been made