Question

Два нагревателя подключены последовательно к источнику с напряжением 100 В. Сопротивление первого нагревателя 30 Ом и на нем выделяется мощность 120 Вт. Какая мощность выделяется на втором нагревателе?с решением!!

Answer 1

Дано

U=100В

R1=30 Ом

P1=120 Вт

 

 Р2=?

 

 Решение

в последовательном подключении во все участки цепи силы тока равны

находим силу тока по след формуле

P1=I^2*R1 => I=корень(P1/R1) = 2A

P=U*I=200Вт 

Р2=Р-Р1=200-120=80Вт

 

 

 

 

 

 

 

 

 

 

Answer 2

P1=I*I*R1

P1=120

R1=30

Значит, I=2A

100=I*R1 + I*R2 (так как посл)

I*R2=40

P2-I*I*R2=2*40=80вт

Answer 3

Calculation of Power on the Second Heater

To calculate the power on the second heater, we need to use the concept of series circuits. In a series circuit, the current passing through each component is the same. Therefore, we can use Ohm's Law and the power formula to find the power on the second heater.

Given: - Voltage (V) = 100 V - Resistance (R1) of the first heater = 30 Ω - Power (P1) on the first heater = 120 W

Using Ohm's Law, we can find the current (I) passing through the circuit:

V = I * R1

Substituting the given values:

100 = I * 30

Solving for I:

I = 100 / 30

Now that we have the current passing through the circuit, we can calculate the power on the second heater using the power formula:

P2 = I^2 * R2

Since the second heater is connected in series with the first heater, the total resistance (R_total) is the sum of the resistances of both heaters:

R_total = R1 + R2

Substituting the given values:

30 + R2 = R_total

Simplifying:

R2 = R_total - 30

Now we can substitute the values into the power formula:

P2 = I^2 * (R_total - 30)

Substituting the value of I:

P2 = (100 / 30)^2 * (R_total - 30)

Simplifying further:

P2 = (100 / 30)^2 * (R_total - 30)

Now we need to find the value of R_total. To do this, we can use the fact that the power on the first heater is given by:

P1 = I^2 * R1

Substituting the given values:

120 = (100 / 30)^2 * 30

Simplifying:

120 = (100 / 30)^2 * 30

Solving for R_total:

R_total = (120 / (100 / 30)^2) + 30

Now we can substitute the value of R_total back into the power formula for the second heater:

P2 = (100 / 30)^2 * (R_total - 30)

Calculating this expression will give us the power on the second heater.

Please note that the actual calculation may involve rounding to the appropriate number of significant figures.

Let me calculate the power on the second heater for you.