Question

Numericals of heating effects

Answer 1

Answer:

Heating Effect of Electric Current, Joule's law: Solved Example...

• An electric heater of resistance 10 Ω connected to 220 V power supply is immersed in the water of 1 kg. ...
• According to Joule's heating law H = I2 Rt.
• The current passed through the electrical heater = 220V/10Ω = 22 A.
• The heat produced in one second by the electrical heater H = I2 R.

Answer 2

Answer:

Heating Effect of Electric Current, Joule's law: Solved Example Problems. Find the heat energy produced in a resistance of 10 Ω when 5 A current flows through it for 5 minutes. The heat produced in one second H = (22)2 x 10 = 4840 J = 4.84 k J. In fact the power rating of this electrical heater is 4.84 k W.

Explanation:

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