Question

У коло послідовно з мідним дротом, площею поперечного перерізу 5 мм², необхідно ввімкнути свинцевий запобіжник, щоб під час нагрівання дроту більше ніж на 10°С запобіжник розплавився Початкова температура запобіжника 27°С. ЯКУ ПЛОЩУ поперечного перерізу повинен мати запобіжник?​

Answer 1

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Answer 2

Calculating the Required Cross-Sectional Area of the Fuse

To calculate the required cross-sectional area of the fuse needed to prevent the copper wire from heating more than 10°C, we can use the formula:

Q = I^2 * R * t

Where: - Q is the heat generated (in joules) - I is the current (in amperes) - R is the resistance of the wire (in ohms) - t is the time (in seconds)

Step 1: Calculate the Heat Generated

The heat generated can be calculated using the formula:

Q = I^2 * R * t

Step 2: Determine the Required Cross-Sectional Area of the Fuse

The required cross-sectional area of the fuse can be determined by equating the heat generated in the fuse to the heat dissipated by the copper wire.

Step 3: Calculate the Required Cross-Sectional Area

Using the calculated heat generated and the specific heat capacity of lead, we can determine the required cross-sectional area of the fuse.

Let's proceed with the calculations.