Question

Пожалуйста помогите Две лампы с сопротивлением R1 = 60 Ом и R2=100 Ом подключены к источнику тока 220в А) Найти общее сопротивление ламп B) Рассчитать силу тока? D) Найти расход энергии за 10 минут​

Answer 1

Ответ: 37,5 Ом; 5,9А; 0,2кВт*ч

Объяснение:

Дано:

R1=60 Ом

R2=100 Ом

U=220В

t=10мин=1/6ч.

------------------

R-?; I-?; W-?

Будем считать, что лампы подключены параллельно.

R=R1*R2/(R1+R2)=60*100/(60+100)=37,5 Ом

I=U/R=220/37,5=5,9А

W=Pt=UIt=220*5,9*1/6=216,3Вт*ч=0,2кВт*ч

Answer 2

Calculation of Total Resistance (Общее сопротивление)

To find the total resistance (общее сопротивление) of the two lamps connected in parallel, we can use the formula for calculating the total resistance of resistors in parallel:

1/R_total = 1/R1 + 1/R2

where R1 and R2 are the resistances of the two lamps.

Given that R1 = 60 Ω and R2 = 100 Ω, we can substitute these values into the formula:

1/R_total = 1/60 + 1/100

To simplify the calculation, we can find the common denominator:

1/R_total = (100 + 60)/(60 * 100) = 160/6000

Now, we can invert both sides of the equation to find R_total:

R_total = 6000/160 = 37.5 Ω

Therefore, the total resistance of the two lamps connected in parallel is 37.5 Ω.

Calculation of Current (Сила тока)

To calculate the current (сила тока) flowing through the circuit, we can use Ohm's Law, which states that the current is equal to the voltage divided by the resistance:

I = V/R_total

Given that the voltage (источник тока) is 220 V and the total resistance (общее сопротивление) is 37.5 Ω, we can substitute these values into the formula:

I = 220/37.5

Calculating this expression gives us:

I ≈ 5.87 A

Therefore, the current flowing through the circuit is approximately 5.87 Amperes.

Calculation of Energy Consumption (Расход энергии)

To find the energy consumption (расход энергии) over a period of 10 minutes, we can use the formula:

Energy = Power * Time

The power (мощность) can be calculated using the formula:

Power = (V^2) / R_total

Given that the voltage (источник тока) is 220 V and the total resistance (общее сопротивление) is 37.5 Ω, we can substitute these values into the formula:

Power = (220^2) / 37.5

Calculating this expression gives us:

Power ≈ 1280 W

Now, we can calculate the energy consumption over 10 minutes:

Energy = Power * Time = 1280 * 10 minutes

Calculating this expression gives us:

Energy ≈ 12800 Watt-minutes

Therefore, the energy consumption over 10 minutes is approximately 12800 Watt-minutes. Please note that these calculations assume ideal conditions and do not take into account factors such as variations in resistance due to temperature changes or other circuit components.