A circuit includes a cell with electromotive force $E$ and internal resistance $r$, linked to a resistor with resistance $R$. The current in the circuit is $I$. Which equation is correct?
- A$E - Ir = IR$
- B$E = Ir - IR$
- C$E + Ir = IR$
- D$E = IR$
Physics 9702 · AS & A Level · Practical circuits