Question

20 балов, срочно! Рассчитайте стоимость электроэнергии при тарифе 4 коп за 1 кВт-ч, потребляемой электрическим утюгом за t = 4,0 ч работы, если он включен в сеть напряжением U = 220 В при силе тока I = 4,55 А.

Answer 1

Тариф=20 коп/кВт * ч
t=4ч
U=220 B; |=4.55 А
Стоимость-?
Решение
U * | * t тариф= 220 B * 4.55 A * 4ч * 20коп/кВт * ч= 4кВт * ч * 20коп/кВт * ч= 80 коп

Answer 2

Calculation of the Cost of Electricity

To calculate the cost of electricity consumed by an electric iron, we need to know the tariff rate and the duration of its operation. In this case, the tariff rate is 4 kopeks per 1 kilowatt-hour (kWh), and the iron operates for 4.0 hours.

To calculate the cost, we can use the formula:

Cost = Power x Time x Tariff Rate

Where: - Power is the power consumption of the iron, which can be calculated using the formula: Power = Voltage x Current. - Time is the duration of operation. - Tariff Rate is the cost per kilowatt-hour.

Let's calculate the cost step by step:

1. Calculate the power consumption of the iron: - Voltage (U) = 220 V - Current (I) = 4.55 A - Power (P) = Voltage x Current

Power (P) = 220 V x 4.55 A

2. Calculate the cost of electricity: - Power (P) = 220 V x 4.55 A - Time (t) = 4.0 hours - Tariff Rate = 4 kopeks per 1 kWh

Cost = Power x Time x Tariff Rate

Now, let's substitute the values and calculate the cost.

Calculation:

1. Calculate the power consumption of the iron: - Power (P) = 220 V x 4.55 A

Power (P) = 1001 W

2. Calculate the cost of electricity: - Power (P) = 1001 W - Time (t) = 4.0 hours - Tariff Rate = 4 kopeks per 1 kWh

Cost = 1001 W x 4.0 hours x 4 kopeks per 1 kWh

To convert the cost from kopeks to the desired currency, you can use the appropriate conversion rate.

Please note that the calculation provided is based on the given information and assumptions. If there are any additional factors or specific requirements, please let me know, and I'll be happy to assist you further.