Question

1) Лампа сопротивлением 450 Ом находится под напряжением 220 В. Найдите: а) силу тока в лампе, б) мощность тока, в) работу тока за 1 минуту горения, г) затраченную электроэнергию за неделю постоянной работы (в киловатт-часах), д) количество теплоты, выделившееся В лампе за это же время.​

Answer 1

Ответ:

Объяснение:сила тока=220в:450ом=приблизительно0.49А

мощность=220*0.49=450Вт (бо ток приблизительний)

7 дней=604800сек

w=мощность*время=450*604800=272160000дж

теплоту не знаю, прости

Answer 2

Calculation of Current, Power, Work, Energy, and Heat in a Lamp

To find the current, power, work, energy, and heat in a lamp with a resistance of 450 Ω and a voltage of 220 V, we can use the following formulas:

a) Current (I): The current flowing through the lamp can be calculated using Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R): I = V / R.

b) Power (P): The power consumed by the lamp can be calculated using the formula: P = I^2 * R.

c) Work (W): The work done by the current in 1 minute of burning can be calculated using the formula: W = P * t where t is the time in minutes.

d) Energy (E): The energy consumed by the lamp in 1 week of continuous operation can be calculated using the formula: E = P * t * 60 * 24 * 7 / 1000 where t is the time in minutes and the division by 1000 is to convert the result to kilowatt-hours.

e) Heat (Q): The heat generated by the lamp in the same time period can be calculated using the formula: Q = W.

Now let's calculate the values using the given information:

a) Current (I): Using Ohm's Law, we can calculate the current flowing through the lamp: I = V / R = 220 V / 450 Ω.

b) Power (P): Using the calculated current, we can find the power consumed by the lamp: P = I^2 * R.

c) Work (W): Using the calculated power and assuming the time of burning is 1 minute, we can find the work done by the current: W = P * t.

d) Energy (E): Using the calculated power and assuming the time of continuous operation is 1 week, we can find the energy consumed by the lamp: E = P * t * 60 * 24 * 7 / 1000.

e) Heat (Q): Using the calculated work, we can find the heat generated by the lamp: Q = W.

Let's calculate the values:

a) Current (I): I = 220 V / 450 Ω = 0.488 A.

b) Power (P): P = (0.488 A)^2 * 450 Ω.

c) Work (W): W = P * 1 minute.

d) Energy (E): E = P * 1 week * 60 minutes/hour * 24 hours/day * 7 days/week / 1000.

e) Heat (Q): Q = W.

Please note that the calculations for work, energy