Determine the amount of heat released in the heating device within 0.5 hours
| July 26, 2021 | education
Determine the amount of heat released in the heating device within 0.5 hours if it is connected to a 110 V network and has a resistance of 24 ohms.
These tasks: t (duration of the heating device) = 0.5 h (in SI t = 1800 s); U (mains voltage) = 110 V; R (resistance of the taken device) = 24 ohms.
The amount of heat that the taken heating device should emit during operation is calculated using the Joule-Lenz law: Q = U ^ 2 * t / R.
Let’s perform the calculation: Q = 110 ^ 2 * 1800/24 = 907 500 J.
Answer: In the taken heating device, 907,500 J of heat will be released in 0.5 hours of operation.
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