Calculating E.m.f
- The e.m.f ε is defined by the equation:
- E.m.f can therefore be defined as the total, or maximum, voltage available to the circuit
Worked example
A battery of e.m.f 7.3 V and internal resistance r of 0.3 Ω is connected in series with a resistor of resistance 9.5 Ω.
Determine:
a) The current in the circuit
b) Lost volts from the battery
