Question

спираль утюга изготовлена из нихрома с поперечным сечением 0,2 мм^2 и длиной 2,5м Какова мощность утюга, если он рассчитан на 220 В?​

Answer 1

Ответ:

ответ на рисунке

Объяснение:

Answer 2

Calculation of the Power of the Iron

To calculate the power of the iron, we need to use the formula:

Power (P) = Voltage (V) x Current (I)

In this case, the voltage is given as 220 V. However, we don't have the current value directly. To find the current, we can use Ohm's Law, which states that:

Current (I) = Voltage (V) / Resistance (R)

To find the resistance, we need to know the cross-sectional area and length of the iron spiral. The cross-sectional area is given as 0.2 mm^2, and the length is given as 2.5 m.

Using the formula for resistance:

Resistance (R) = Resistivity (ρ) x Length (L) / Cross-sectional Area (A)

We need to know the resistivity of the material to calculate the resistance. However, the resistivity of the material (in this case, nichrome) is not provided. Therefore, we cannot calculate the resistance and subsequently the current and power of the iron.

Unfortunately, without the resistivity value, we cannot determine the power of the iron.