Question

Рассчитайте стоимость электрической энергии при тарифе 2,26 руб за 1 кВтч, потребляемой электрическим утюгом за 4 часа работы, если он включён в электрическую сеть с напряжением 120В при силе тока 2,5 А .

Answer 1

C=UItЦ=220*2,5*4*2,26/1000=2,2*2,26 руб. Умножать влом

Answer 2

Calculation of Electricity Cost

To calculate the cost of electricity consumed by an electric iron for 4 hours of operation, we need to consider the tariff rate and the power consumption of the iron.

Given: - Tariff rate: 2.26 rubles per 1 kWh (kilowatt-hour) - Electric iron operating for 4 hours - Voltage: 120V - Current: 2.5A

To calculate the power consumption of the electric iron, we can use the formula:

Power (in watts) = Voltage (in volts) x Current (in amperes)

Substituting the given values:

Power = 120V x 2.5A = 300W

Now, we can calculate the energy consumed by the electric iron in kilowatt-hours (kWh) using the formula:

Energy (in kWh) = Power (in watts) x Time (in hours) / 1000

Substituting the values:

Energy = 300W x 4 hours / 1000 = 1.2 kWh

Finally, we can calculate the cost of electricity consumed by multiplying the energy consumption by the tariff rate:

Cost = Energy (in kWh) x Tariff Rate (in rubles per kWh)

Substituting the values:

Cost = 1.2 kWh x 2.26 rubles/kWh = 2.712 rubles

Therefore, the cost of electricity consumed by the electric iron for 4 hours of operation is approximately 2.712 rubles.

Please note that the above calculation assumes a constant power consumption of the electric iron throughout the 4-hour period. In reality, the power consumption may vary slightly depending on the iron's temperature and usage patterns.