Question

Задача на расчет работы или мощности тока, КПД источника тока. Сколько теплоты выделится в проводнике сопротивлением 10 Ом за 5 мин при токе 0,02 А?

Answer 1

Дано: R=10 Ом; t=5 мин=300 с; I=0,02 А; Q  - ?

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Q=I²Rt - закон Джоуля-Ленца.

Q=0,02²*10*300=1,2 Дж.  Это ответ.

Answer 2

Task Analysis

The task involves calculating the heat generated in a conductor with a resistance of 10 ohms, a current of 0.02 A, and a time period of 5 minutes.

Calculation of Heat Generated

To calculate the heat generated in the conductor, we can use the formula: Q = I^2 * R * t Where: - Q is the heat generated - I is the current - R is the resistance - t is the time

Substituting the given values: Q = (0.02 A)^2 * 10 ohms * 5 min

Conversion of Time

It's important to note that the time should be converted to seconds for consistency in units. 1 minute is equal to 60 seconds.

Calculation

Let's calculate the heat generated using the given values and the formula.

Q = (0.02 A)^2 * 10 ohms * 5 min = (0.0004 A^2) * 10 ohms * 300 s = 0.12 Joules

Therefore, the heat generated in the conductor with a resistance of 10 ohms, a current of 0.02 A, and a time period of 5 minutes is 0.12 Joules.