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Time required to boil 2 litres of water initially at 20°C by a heater coil which works at 80% efficiency spending 500 joule/s is
  • a)
    82 minutes
  • b)
    50 minute 
  • c)
    28 minutes
  • d)
    37 minutes
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Time required to boil 2 litres of water initially at 20°C by a hea...
Heat required to boil water = mcΔq
= 2 x 4200 x (100 - 20)
= 6.72 x 103J
If t be the time of boil then
η x 500 x t = 6.72 x 103
or 
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Most Upvoted Answer
Time required to boil 2 litres of water initially at 20°C by a hea...
The time required to boil 2 liters of water initially at 20 degrees Celsius will depend on various factors, including the heat source, the efficiency of the pot or kettle, and the altitude or atmospheric pressure. However, as a general estimate, it usually takes around 10-15 minutes to bring 2 liters of water to a boil on a typical stovetop burner.
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Time required to boil 2 litres of water initially at 20°C by a heater coil which works at 80% efficiency spending 500 joule/s isa)82 minutesb)50 minutec)28 minutesd)37 minutesCorrect answer is option 'C'. Can you explain this answer?
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