Electrical Engineering XYZ MCQs
The method that can be used for changing power factor from leading to lagging:
- Series capacitor
- Shunt capacitor
- Any of these
- Shunt reactor
Correct answer: 4. Shunt reactor
Explanation: Power factor is a measure of how effectively electrical power is being converted into useful work output. It can be leading or lagging, and adjusting it can have important implications for power system efficiency.
To change power factor from leading to lagging, a shunt reactor can be used. Shunt reactors are devices that are connected in parallel with the power system, and they are mainly used to compensate for capacitive reactive power. By adjusting the amount of reactive power supplied or absorbed by the shunt reactor, the overall power factor of the system can be modified.
While series capacitors and shunt capacitors are devices used for power factor correction, they generally contribute to leading power factor, not lagging. Therefore, in the context of the question, a shunt reactor would be the appropriate choice for changing power factor from leading to lagging.