Determine the amount of heat released in the conductor by current in 1.5 minutes if the current in the circuit is 5 A and the voltage at the ends of the conductor is 200 V.
Given: t (operating time of the current in the circuit) = 1.5 min (90 s); I (current in the circuit) = 5 A; U (voltage at the ends of the conductor that is connected to the circuit) = 200 V.
The amount of heat that a conductor with a current will release in 1.5 minutes is calculated according to the Joule-Lenz law: Q = I ^ 2 * R * t = I * U * t.
Let’s make the calculation: Q = 5 * 200 * 90 = 90,000 J (90 kJ).
Answer: A conductor with a current will release 90 kJ of heat in 1.5 minutes.
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