Science

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

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Given,

I = 15 A

R = 8 Ω

The rate at which the heat develops in the heater (P) = I²R

Substituting the values in the equation, we get

P = 15 x 15 x 8 = 1800 watt

Therefore, electric heater produces heat at the rate of 1800 W

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