Consider a combination circuit consisting of resistors connected to a battery. What will be the current and voltage across each resistor in the circuit? The known values are the values of the resistors and the battery voltage.The unknowns are the total resistance and total current in the circuit and the current and voltage across each resistor. The first step is to simplify the two parallel resistors into a single resistor with its equivalent resistance. Now, the series combination of these two resistors is equivalent to a 5 Ohm resistor. Using ohm's law, the total current in the circuit is determined to be 4 amperes. To find the current and voltage across each resistor, revert to the original circuit. The current in series-connected resistor R1 is the same. So, the I1 equals 4 amperes. In the parallel combination of two identical resistors R2 and R3, the current is equally divided between them, which is 2 amperes. Finally, with the known current values and using ohm's law, the voltage drop across each resistor can be determined.