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Which of the following voltage regulation is considered to be the best?
2%
30%
70%
98%
2%
Voltage regulation is a measure of the change in voltage at the output terminals of a device (like a transformer or generator) when the load changes from full load to no load. A smaller percentage value indicates that the output voltage remains more stable despite variations in load current, which is desired for high-performance systems.
Voltage regulation is a measure of the change in voltage at the output terminals of a device (like a transformer or generator) when the load changes from full load to no load. A smaller percentage value indicates that the output voltage remains more stable despite variations in load current, which is desired for high-performance systems.
%Regulation=VFLтАЛVNLтАЛтИТVFLтАЛтАЛ├Ч100
The regulation is calculated by comparing the no-load voltage to the full-load voltage. Since the goal of any power supply or transformer is to maintain a constant output voltage, a deviation of 0% would be ideal. Therefore, the lower the percentage value, the closer the device is to an ideal voltage source.
Voltage regulation indicates the stability of the output voltage under varying load conditions.
Lower regulation percentage implies better performance and tighter voltage control.
A value of 0% would represent a perfectly constant voltage, which is theoretically ideal.
Minimized voltage drops for sensitive equipment.
Improved power quality for industrial machinery.
Lower regulation devices (like high-efficiency transformers) are often more expensive to manufacture.
Increased design complexity to compensate for internal impedance.
Precision electronic power supplies.
Electrical distribution transformers.
Synchronous generators.
Regulation of 2% is significantly closer to 0% than the other options (30%, 70%, 98%).
High values like 98% indicate that the output voltage drops drastically under load, making it unsuitable for most power distribution applications.
A is correct тАФ A lower percentage value for voltage regulation signifies a smaller change in voltage from no-load to full-load, which denotes a more stable and better-performing system.
In competitive exams, always remember that for regulation and error-related metrics, 'smaller' is almost always 'better'.