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A lamp for which converts 70 W out of every 20 W into thermal energy the lamp is being used for the sole purpose of the lighting room. calculate the efficiency
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3 votes
3 votes
A lamp for which converts 70 W out of every 20 W into thermal energy the lamp is being used for the sole purpose of the lighting room.

calculate the efficiency

User Choucavalier
by
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1 Answer

25 votes
25 votes

Answer:

71 % eff

Step-by-step explanation:

if 50 out of 70 watt goes to making light

50/70 = 71 %

User Miguel Borges
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2.5k points
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