A microwave oven operates at 2.5 GHz. Assume that 5% of microwave photons are absorbed by...

  

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A microwave oven operates at 2.5 GHz. Assume that 5% of microwave photons are absorbed by 200 ml of water kept inside the oven. The time needed to warm the water from 20Cto 70C is 2 minute. Specific heat capacity of water is 4.2Jg-1. C-1. Neglect any heat loss by water to the surrounding. Calculate the number of photons emitted per second per kilowatt of power consumed by the microwave. Efficiency of the oven to convent electrical energy into microwave energy is 70% A microwave oven operates at 2.5 GHz. Assume that 5% of microwave photons are absorbed by 200 ml of water kept inside the oven. The time needed to warm the water from 20Cto 70C is 2 minute. Specific heat capacity of water is 4.2Jg-1. C-1. Neglect any heat loss by water to the surrounding. Calculate the number of photons emitted per second per kilowatt of power consumed by the microwave. Efficiency of the oven to convent electrical energy into microwave energy is 70%

Answer rating: 100% (QA)

First lets calculate the amount of energy required to heat the water from 20C to 70C Temperature cha... View the full answer