What amount of heat is released in a conductor in 10 minutes if, at a voltage of 20 V, the current in it is 0.2 A?
| September 28, 2021 | education
Determine, from Ohm’s law, the resistance of an electrical circuit.
I = U / R.
R = U / I = 20 / 0.2 = 100 Ohm.
According to the Joule-Lenz law, we determine the amount of heat released in the conductor.
Q = I ^ 2 * R * t = 0.2 ^ 2 * 100 * 10 * 60 = 2400 J = 2.4 kJ.
Answer: The amount of heat is 2.4 kJ.
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