EMF and Internal Resistance Flashcards
1
Q
What is emf
A
Emf is the energy given to each coulomb of charge as it passes through the source.
2
Q
What is the vTPD
A
TPD is the energy given to each coulomb of charge
3
Q
What is lost volts?
A
Lost volts is the amount of voltage dropped across the internal resistance
4
Q
What happens when the switch is open?
A
Voltage reading = emf
No current flowing, I = 0A
5
Q
What happens when the switch is closed?
A
Current flows
Emf = Vtpd + Lost Volts
6
Q
What happens to the Vtpd when you add resistors in series ?
A
R increases Current decreases Lost Volts decreases E stays the same (E = V + Ir) V increases
7
Q
What happens to the Vtpd when you add resistors in parallel?
A
R decreases Current increases Lost Volts increases E stays the same V must decrease
