Why V sub1 is zero 20 k 00 V 200V SC Solutionhere your given

Solution

here your given V₁ is short circuited voltage and I_sc is short circuited current through short circuited element.

here short circuit means the internal resistance of short circuit is zero.

that is R=0 so volatage V₁=I_sc*R

=I_sc*0

=0

therefore V₁=0

likewise the internal resistance of open circuit is Infinite.

i.e. R=infinite.