system power factor is changed
some loads are switched off
system voltage is reduced
system frequency is reduced Efficiency is the secondary consideration in
Answer is Wrong!
Answer is Right!
The correct answer is: B. some loads are switched off.
Load shedding is the process of intentionally reducing the load on an electrical system to prevent a blackout. This is done by switching off some of the loads, usually the ones that are least essential.
The other options are incorrect because:
- A. system power factor is changed. The power factor is the ratio of real power to apparent power. It is not changed during load shedding.
- C. system voltage is reduced. The system voltage may be reduced during load shedding, but this is not the main purpose of load shedding.
- D. system frequency is reduced. The system frequency is not reduced during load shedding.
Efficiency is the secondary consideration in load shedding. The main consideration is to prevent a blackout. Efficiency can be improved by using more efficient loads, but this is not always possible.