Class 11Physics1 Thermal Properties of Matter: Thermometry, Expansion and CalorimetryMix Examples-Thermometry, Thermal Expansion and Calorimetry
DifficultOne $kg$ of water, at $20, ^oC$, is heated in an electric kettle whose heating element has a mean (temperature averaged) resistance of $20, \Omega$. The rms voltage in the mains is $200, V$. Ignoring heat loss from the kettle, the time taken for water to evaporate fully is close to.......... $min$. [Specific heat of water $= 4200, J/kg, ^oC$, Latent heat of water $= 2260, kJ/kg$]
- A$3$
- B$10$
- C$22$
- D$16$
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