Question

К напряжению U=220 подключен нагревательный элимент.Сила тока в цепи I=4А.Определите мощность прибора и стоимость энергии за 6 часов ,если стоимость 1кВт=1,8руб.

Answer 1

Мощность P = I (сила тока) * U (напряжение)
P = 220 * 4 = 880 Вт
Работа тока А = P * t                  t  = 6 часов
A = 880 * 6 = 5280 Вт * час = 5,28 кВт * час
Стоимость = 5, 28 * 1,8 = 9 руб 50 коп

Answer 2

Calculation of Power and Cost of Energy

To calculate the power and cost of energy for the given scenario, we can use the formulas:

Power (P) = Voltage (U) × Current (I)

Cost of Energy (C) = Power (P) × Time (t) × Cost per kilowatt-hour (kWh)

Given: - Voltage (U) = 220 V - Current (I) = 4 A - Time (t) = 6 hours - Cost per kilowatt-hour (kWh) = 1.8 rubles

Let's calculate the power and cost of energy step by step.

Calculation of Power (P)

Using the formula Power (P) = Voltage (U) × Current (I), we can substitute the given values:

Power (P) = 220 V × 4 A

Calculating the above expression gives us:

Power (P) = 880 Watts

Therefore, the power of the device is 880 Watts.

Calculation of Cost of Energy (C)

Using the formula Cost of Energy (C) = Power (P) × Time (t) × Cost per kilowatt-hour (kWh), we can substitute the given values:

Cost of Energy (C) = 880 Watts × 6 hours × 1.8 rubles/kWh

Calculating the above expression gives us:

Cost of Energy (C) = 9,984 rubles

Therefore, the cost of energy for 6 hours of usage is 9,984 rubles.

Please note that the above calculations are based on the given values and assumptions.