Question

A heater coil connected to 220 V supply, has a resistor of 150 ohm. How long will this coil take to heat
1 kg of water from 20 to 60°C, assuming that all heat is taken up by water? (Given: Heat capacity of
water 4186 J/kg•°C)
[Ans. 518.9 s]​.​

Answer 1

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