Question

Three resistors R1=2.0Ω, R2=12.0Ω, and R3=8.0Ω are connected in series with a 9.0-V battery. (a) Show the illustration (b) Calculate the current in the circuit and show that the sum of all voltage changes around the circuit is zero.

Answer 1

$R=R_1=R_2+R_3=22~\Omega,$

$I=\frac UR=400~mA.$