Question

При проходженні електричного струму по провіднику його опір збільшився в два рази внаслідок нагрівання від 0°С до 250 °С. Визначте температурний коефіцієнт опору речовини, з якої виготовили провідник.

Answer 1

Відповідь: 0,004 1/ ⁰С

Пояснення:

Answer 2

Calculation of the Temperature Coefficient of Resistance

To determine the temperature coefficient of resistance (TCR) of the material from which the conductor is made, we need to use the formula:

TCR = (R2 - R1) / (R1 * (T2 - T1))

Where: - TCR is the temperature coefficient of resistance - R1 is the initial resistance of the conductor at temperature T1 (0°C in this case) - R2 is the final resistance of the conductor at temperature T2 (250°C in this case) - T1 is the initial temperature (0°C) - T2 is the final temperature (250°C)

In this case, the resistance of the conductor has doubled, which means R2 is twice the value of R1.

Let's plug in the values and calculate the temperature coefficient of resistance:

R2 = 2 * R1 T1 = 0°C T2 = 250°C

TCR = (2 * R1 - R1) / (R1 * (250 - 0))

Simplifying the equation:

TCR = R1 / (R1 * 250) TCR = 1 / 250

Therefore, the temperature coefficient of resistance of the material from which the conductor is made is 1/250.

Please note that the specific material from which the conductor is made was not provided in the question. The temperature coefficient of resistance can vary depending on the material.