Three resistors, $R_1$, $R_2$ and $R_3$, are joined in parallel to a cell. The currents through the resistors are $I_1$, $I_2$ and $I_3$. The p.d.s across the resistors are $V_1$, $V_2$ and $V_3$. The current in the cell is $I_0$. The p.d. across the cell is $V_0$, as shown. Which equation can be deduced by applying Kirchhoff's second law to the circuit?
- A$I_0 = I_1 = I_2 = I_3$
- B$I_0 = I_1 + I_2 + I_3$
- C$V_0 = V_1 = V_2 = V_3$
- D$V_0 = V_1 + V_2 + V_3$