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Power factor is highest in case of
- a)Mercury arc lamp
- b)sodium vapour lamp
- c)Tube lights
- d)GLS lamps
Correct answer is 'D'. Can you explain this answer?
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Power factor is highest in case ofa)Mercury arc lampb)sodium vapour la...
Explanation:
Power factor is defined as the ratio of the real power (in watts) to the apparent power (in volt-amperes) in an AC circuit. It is a measure of how efficiently electrical power is being used.
GLS lamps or incandescent lamps have the lowest power factor among all the given options. This is because they have a high inrush current and a large phase angle between voltage and current.
On the other hand, fluorescent lamps or tube lights have a relatively higher power factor due to their ballast, which helps in correcting the power factor.
Sodium vapour lamps have an even higher power factor than fluorescent lamps due to the use of a high-frequency electronic ballast.
However, the highest power factor is found in mercury arc lamps. These lamps have an extremely low current waveform distortion and almost unity power factor. This is because they require a high voltage to ignite, which results in a near-perfect sinusoidal current waveform.
Therefore, the correct answer is option D - GLS lamps.
Power factor is defined as the ratio of the real power (in watts) to the apparent power (in volt-amperes) in an AC circuit. It is a measure of how efficiently electrical power is being used.
GLS lamps or incandescent lamps have the lowest power factor among all the given options. This is because they have a high inrush current and a large phase angle between voltage and current.
On the other hand, fluorescent lamps or tube lights have a relatively higher power factor due to their ballast, which helps in correcting the power factor.
Sodium vapour lamps have an even higher power factor than fluorescent lamps due to the use of a high-frequency electronic ballast.
However, the highest power factor is found in mercury arc lamps. These lamps have an extremely low current waveform distortion and almost unity power factor. This is because they require a high voltage to ignite, which results in a near-perfect sinusoidal current waveform.
Therefore, the correct answer is option D - GLS lamps.
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Power factor is highest in case ofa)Mercury arc lampb)sodium vapour la...
B
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Power factor is highest in case ofa)Mercury arc lampb)sodium vapour lampc)Tube lightsd)GLS lampsCorrect answer is 'D'. Can you explain this answer?
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