Question

what is the current through a series circuit with three 2-ohm resistors and a 9-volt battery

Answer 1

In a series circuit, the total resistance is the sum of the individual resistors.

Total = 2 + 2 + 2 = 6 ohms.

Current  =  (voltage) / (resistance)  =  9 V / 6 ohms  = 1.5 Amperes