Seema Kumari
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Posted 4 year ago

How do you calculate the efficiency of a lamp?

1 Answer(s)
pradeep negi
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Posted 4 year ago pradeep negi

  1. The efficiency of a device, such as a lamp, can be calculated:
  2. efficiency = useful energy out ÷ total energy in (for a decimal efficiency)
  3. or.
  4. efficiency = (useful energy out ÷ total energy in) × 100 (for a percentage efficiency)