The per unit impedance of a transformer is

Right Answer is:
The same whether computed from primary or secondary side

SOLUTION

The Per Unit value of any quantity is defined as the ratio of actual value to the base value.

PU value = actual value/base value

Per unit system in transformers:

The per-unit impedance of a transformer is the same whether computed from the primary or secondary side so long as the voltage bases on the two sides are in the ratio of transformation (equivalent per phase ratio of a three-phase transformer which is the same as the ratio of line-to-line voltage rating).

The per unit impedance of a transformer is

Always zero

Larger if computed from primary side than from secondary side

Always infinity

The same whether computed from primary or secondary side

Right Answer is:
The same whether computed from primary or secondary side

SOLUTION

The per unit impedance of a transformer is

Always zero

Larger if computed from primary side than from secondary side

Always infinity

The same whether computed from primary or secondary side

Right Answer is: The same whether computed from primary or secondary side

SOLUTION

Right Answer is:
The same whether computed from primary or secondary side