Source transformation 1

.PS
include(pstricks.m4)

scale=25.4

cct_init

define(`termrad_',`sourcerad_/4')
define(`terminal',`circle rad termrad_')

vsp=25
hsp=20

O: (0,0)

move to O

Ia: source(up_ vsp,V,);llabel(,i_a,);rlabel(,2\;\text{mA},)
line right hsp*1.25
{ dot(at Here)
  R1: resistor(down_ to (Here.x,O.y));rlabel(,R_1,);llabel(,5\;\text{k}\Omega,);b_current(I_q,rjust,In,End)
  dot(at Here)
}
R4: resistor(right_ hsp*2);rlabel(,R_4,);llabel(,2\;\text{k}\Omega,)
{ dot(at Here)
  R2: resistor(down_ to (Here.x,O.y));rlabel(,R_2,);llabel(,4\;\text{k}\Omega,)
  dot(at Here)
}
line right hsp*1.25
R3: resistor(down_ to (Here.x,O.y));rlabel(,R_2,);llabel(,4\;\text{k}\Omega,)
line left to R2.end
Vb: source(left_ to 1/2 between Here and R1.end,V,);rlabel(,v_b,);llabel(,5\;\text{V},)
R5: resistor(left_ to R1.end);rlabel(,R_5,);llabel(,1\;\text{k}\Omega,)
line to O

.PE