What must be the efficiency of an electric kettle marked 500 W, 230 V, if it was found to bring 1 kg of water at 15
to boiling point in 15 min? (Given specific heat capacity of water 
J/kg℃)
a)
79%
b)
81%
c)
72%
d)
69%
What must be the efficiency of an electric kettle marked 500 W, 230 V, if it was found to bring 1 kg of water at 15 to boiling point in 15 min? (Given specific heat capacity of water J/kg℃)
a)
79%
b)
81%
c)
72%
d)
69%
Question ID - 151331 | SaraNextGen Top Answer
What must be the efficiency of an electric kettle marked 500 W, 230 V, if it was found to bring 1 kg of water at 15 to boiling point in 15 min? (Given specific heat capacity of water J/kg℃)
a)
79%
b)
81%
c)
72%
d)
69%
|
What must be the efficiency of an electric kettle marked 500 W, 230 V, if it was found to bring 1 kg of water at 15 |
|||||||
|
a) |
79% |
b) |
81% |
c) |
72% |
d) |
69% |
1 Answer
127 votes
Answer Key / Explanation : (a) -
|
(a) Heat produced Where,
Heat absorbed by water
Efficiency
|
J
watt
J
127 votes
Answer Link
127