V= V
R1= Ω
R2= Ω
R3= Ω
RT= Ω
I1= A
I2= A
I3= A
IT= A
V1= V
V2= V
V3= V
R1 IN SERIES WITH R23
(R2 IN PARALLEL WITH R3)

 1

 R23
=  1

 R2
+  1

 R3
RT = R1 + R23
IT=  VT

 RT
= I1= I23
I2= V2

 R2
I3= V3

 R3
V1 = R1 I1 V23 = R23 I23 V23 =V2 = V3
Change the values of voltage and resistance turn on the switch!