1.

An electric heater of resistance 8 Omega draws 15A from the service mains for 2hours. Calculate the rate at which heat is developed in the heater?

Answer»

SOLUTION :Here RESISTANCE of electric HEATER `R=8 Omega`, and current DRAWN by heater `I=15A`
`therefore` Rate at which heat is developed in the heater =`I^2R=(15)^2 times 8=1800 W`


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