Question

In a short transmission line, voltage regulation is zero only when the load at the receiving end operates at:

• A. Unity power factor
• B. 0.707 (lag)
• C. Leading power factor
• D. Lag or lead power factor

Hint:

Voltage regulation is zero when the receiving end operates at unity power factor, meaning there is no reactive power drawn by the load.

Answer 1

The Correct Option is A

In a short transmission line, the voltage regulation is zero when the load at the receiving end operates at unity power factor.
At unity power factor, the voltage at the receiving end is equal to the voltage at the sending end, which means there is no voltage drop across the transmission line, resulting in zero voltage regulation.
Thus, the correct answer is unity power factor.