Current electricity

VITEEE 2015 Guidance › Electricity and magnetism questions › Current electricity

Ques) A coil of current crrying Nichrome wire is immersed in aliquid. When the potetial difference across the coil is 12 V and the current through the coil is 5.2 A., the liquidm evaporated at the steady rate of 21mg/sec. Calculate the heat of Vapourization of the liquid

#Physics #Electricity and magnetism

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Tush Watts ·2009-08-21 05:10:56

Power delivered by coil, P = i2R = 5.22 x 12 = 324.48 W

rate of evapoartion of liquid = 21 mg/s = 21 x 10-6 kg/s

heat gained by liquid per second = (21 x 10-6) L (where L is the latent heat of vaporization)

324.48 = (21 x 10-6) L

L = 15.45 x 106 J / kg

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