Question

Теплова потужність ділянки пола, що скоюється з двох послідовно з'єднаних провід дорівнює 80 Вт. Визначте загальну силу струму в ділянці, якщо відомо, що один із провідників має опір 15,8 Ом, в другий являє собою нікеліновий провід завдовжки 10 м і перерізом 1,0 мм². тіки срочно і правильно буд ласка​

Answer 1

Ответ:P= U*I

R=R1+R2

R2= p*l/S

I=P/U

Объяснение:

Answer 2

Calculation of Total Current in the Circuit

To determine the total current in the circuit, we need to use Ohm's Law, which states that the current (I) flowing through a conductor is equal to the voltage (V) across the conductor divided by the resistance (R) of the conductor. The formula for Ohm's Law is:

I = V / R

In this case, we are given the power (P) of the floor section, which is equal to 80 W. The power can be calculated using the formula:

P = V * I

Since we know the power and we need to find the current, we can rearrange the formula to solve for the current:

I = P / V

Now, let's calculate the total current in the circuit.

Calculation Steps:

1. Convert the power from watts (W) to volts (V) using the formula:

P = V * I

Rearranging the formula to solve for voltage:

V = P / I

Substituting the given values:

V = 80 / I

2. Calculate the resistance of the first conductor:

Given that one of the conductors has a resistance of 15.8 Ω.

3. Calculate the resistance of the second conductor:

Given that the second conductor is made of nichrome wire with a length of 10 m and a cross-sectional area of 1.0 mm². The resistance of the wire can be calculated using the formula:

R = (ρ * L) / A

Where: - ρ is the resistivity of the wire material (in this case, nichrome), - L is the length of the wire, and - A is the cross-sectional area of the wire.

The resistivity of nichrome is approximately 1.10 x 10^-6 Ω·m.

Substituting the given values:

R = (1.10 x 10^-6 * 10) / (1.0 x 10^-6)

4. Calculate the total resistance of the circuit:

Since the two conductors are connected in series, the total resistance (R_total) is the sum of the individual resistances:

R_total = R1 + R2

5. Substitute the values of R_total and V into the formula:

I = V / R_total

to calculate the total current in the circuit.

Let's perform the calculations step by step.

Calculation:

1. Convert the power from watts (W) to volts (V):

V = 80 / I [[1]]

2. Calculate the resistance of the first conductor:

Given: R1 = 15.8 Ω

3. Calculate the resistance of the second conductor:

Given: ρ = 1.10 x 10^-6 Ω·m, L = 10 m, A = 1.0 mm²

R2 = (1.10 x 10^-6 * 10) / (1.0 x 10^-6) [[2]]

4. Calculate the total resistance of the circuit:

R_total = R1 + R2

5. Substitute the values of R_total and V into the formula:

I = V / R_total

Please provide the value of the resistance of the first conductor (R1) to proceed with the calculation.