How much heat will be released in a conductor with a current resistance of 20 ohms
| September 4, 2021 | education
How much heat will be released in a conductor with a current resistance of 20 ohms in 3 minutes if the voltage at the ends of the conductor is 9 V?
Initial data: R (conductor resistance) = 20 Ohm; t (current passage time) = 3 min = 3 * 60 s = 180 s; U (voltage at the ends of the conductor) = 9 V.
The amount of heat that should be released on a given conductor is determined using the Joule-Lenz law: Q = U ^ 2 * t / R.
Let’s perform the calculation: Q = 9 ^ 2 * 180/20 = 729 J.
Answer: On this conductor, 729 J of heat will be released in 3 minutes.
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