For the same wattage, which of the following lamp is cheapest?

Energy Conversion Mcqs
BILAL KHATTAK0

A.Sodium vapour lamp
B.Mercury vapour lamp
C.Fluorescent tube 4 ft.
D.Fluorescent tube 2 ft.
E.GLS lamp

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  1. Which lamp is used for cinerma projectors
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  4. Which of the following gives nearly monochromatic light?
  5. Which of the following equipment has power factor closer to unity
  6. Which of the following lamp in a car will have the least wattage
  7. Which of the following is not a first order instrument?
  8. For testing appliances, the wattage of test lamp should be __________?
  9. Which of the following is a first-order instrument?
  10. Which of the following material is not used for cyaniding?

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