1. The problem statement, all variables and given/known data Given circuit consists of two resistors ( R1 = 330 Ohm , R2 = 22K Ohm ) , an LED ( Forward voltage = 1.6V, forward current = 20 mA) , a BC 337 NPN transistor and a 9V battery supply. I need to find the total power consumed by the circuit for a run time of continous 1 hour? 2. Relevant equations V = IR P = VI 3. The attempt at a solution taking the right side of the circuit and appyling the V = IR 9 = (I *330) +(1.6)+voltage across the NPN transistor I am not sure about the voltage across the NPN transistor. And on the left side applying V= IR 9= I *22000 giving I = 4.09*10^-4=400 uA. Is total power consumed by the circuit = sum of power consumed by all individual elements??