Conservation of Energy and Charge in Circuits Flashcards
1
Q
What is Kirchhoff’s first law?
A
The total current entering a junction is equal to the total current leaving it
2
Q
What’s Kirchhoff’s second law?
A
Total EMF around a series circuit is equal to the sum of the pd’s across each component
3
Q
What are the rules for current, voltage and resistance for a series circuit?
A
- The current is the same at all points
- The EMF is split between the components
- The voltage splits proportionally to the resistance
4
Q
What are the rules for current, voltage and resistance for a parallel circuit?
A
- Current is split at each junction
- Voltage is the same across each branch
- 1/Rt = 1/R1 + 1/R2+1/R3
5
Q
What is the total emf of cells connected in series?
A
The sum of each of the cell’s emf
6
Q
What’s the emf of identical cells connected in parallel?
A
The same as an individual cell
