railway RRB JE (CBT I + CBT II) Mock Test 2024 Power Systems PU System and Symmetrical Components Per Unit System
The per unit impedance of a line is X p.u. If base voltage is tripled and base MVA is doubled, the new per unit impedance is:
1
X
2
\(\frac{1}{9} X\)
3
\(\frac{2}{9} X\)
4
9 X