Questions
An electric kettle (rated accurately at 2.5kw) is used to heat 3 kg of water from 15°C to boiling point. It takes 9.5 minutes. Then the amount of heat that has been lost is
detailed solution
Correct option is A
Energy consumed in 9.5 min is given by=(2⋅5×1000)×(9⋅5×60)=14⋅25×105 joule Energy consumed in heating=3×1000×(100−15) joule =2⋅55×105 joule Loss =(14⋅25−2⋅55)105≈10⋅70×105 jouleTalk to our academic expert!
Similar Questions
Consider the following statements.
(A) Specific heat capacity is the cause of formation of land and sea breeze.
(B) The specific heat of water is more than land.
Select the correct option.
(a) (A) is false but (B) is true.
(b) Both (A) and (B) are true.
(c) (A) is true but (B) is false.
(d) Both (A) and (B) are false.
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