Time taken by a 836 W heater to heat one litre of water from `10^@C to – InterviewSolution

InterviewSolution

1.	Time taken by a 836 W heater to heat one litre of water from `10^@C to 40^@C` isA. `50 s`B. `100s`C. `150s`D. `200s`
Answer» Correct Answer - C Let time taken in boiling the water by the heater is t sec. Then `Q = ms Delta T` `(836)/(4.2) t = 1 xx 1000 (40^(@) - 10^(@))` `(836) /(4.2) t = 1000 xx 30 rArr t = (100 xx 30 xx 4.2)/(836) = 150 sec`

Discussion

No Comment Found

Related InterviewSolutions

Calculate amount of heat required to convert `1kg` steam form `100^(@)C to 200^(@)C` steam
A bullte of mass `10 gm` in moving with speed `400 m//s`. Find its kinetic energy in calories?
`1kg` ice at `-10^(@)C` is mixed with `1kg` water at `100^(@)C`. Then final equilirium temperature and mixture content.
`1kg` ice at `-10^(@)` is mixed with `1kg` water at `50^(@)C`. The final equilibrium temperature and mixture content.
Explain, what is meant by the coefficients of linear `(alpha)`, superficial `(beta)` and cubical expansion `(gamma)` of a solid. Gien their units. Find the relatisphip between them.
Write the `S.I`. unit of temperature.
Is is possible to liquefy a gas at any temperature?
At what temperature do the Celsius and Fahrenheit readings have the same numerical value ?
When hot water is poured on a glass plate, it breaks because of
A piece of ice falls from a height `h` so that it melts completely. Only one-quarter of the heat produced is absobed by the ice and all energy of ice gets converted into heat during its fall. The value of `h` is [Latent heat of ice is `3.4 xx 10^(5) J//kg` and `g = 10 N//kg`]