Question

Три резистори опором 12 ом 9 ом 15 ом з'єднані паралельно. напруга на першому резисторі 220в. знайти напругу на кожній лампі, загальну напругу, силу струму на кожній лампі, загальну силу струму, загальний опір ДАЮ 100 БАЛЛОВ, ПЖ!​

Answer 1

Ответ: Див. додаток

Объяснение: Див. додаток

Answer 2

Ответ:

Объяснение:

R1 = 12 Oм

R2 =  9 Oм

R3 =  15 Oм

U1 =  220 B

U2?

U3?

I?

I1 ?

I2?

I3?

R?

U = U1=U2=U3 = 220B

I1 = U/R1 = 220/ 12 ==18.3 A

I2 = U/R2 = 220/ 9 ==24.4 A

I3 = U/R3 = 220/ 15 ==14.7 A

I = I1+I2+i3 = 18.3+24.4+14.7 =57.4 A

R = U/I = 220 / 57.4 == 3.8 Ома

Answer 3

Calculation of Voltage, Current, and Resistance in a Parallel Circuit

To find the voltage, current, and resistance in a parallel circuit with three resistors, we can use the following formulas:

1. Voltage (V) across each resistor in a parallel circuit is the same and can be calculated using Ohm's Law: V = I * R, where V is the voltage, I is the current, and R is the resistance.

2. The total resistance (Rt) in a parallel circuit is calculated using the formula: 1/Rt = 1/R1 + 1/R2 + 1/R3, where R1, R2, and R3 are the resistances of the three resistors.

3. The total current (It) in a parallel circuit is the sum of the currents through each resistor and can be calculated using the formula: It = I1 + I2 + I3, where I1, I2, and I3 are the currents through each resistor.

Now, let's apply these formulas to the given scenario:

Given: - Resistance of the first resistor (R1) = 12 Ω - Resistance of the second resistor (R2) = 9 Ω - Resistance of the third resistor (R3) = 15 Ω - Voltage across the first resistor (V1) = 220 V

Calculating the Voltage across Each Lamp

Since the voltage across each resistor in a parallel circuit is the same, the voltage across each lamp will also be 220 V.

Calculating the Total Voltage

The total voltage in a parallel circuit is equal to the voltage across each resistor. Therefore, the total voltage in this scenario is also 220 V.

Calculating the Current through Each Lamp

To calculate the current through each lamp, we need to find the total current first. The total current can be calculated using the formula mentioned earlier: It = I1 + I2 + I3.

To find the current through each resistor, we can rearrange Ohm's Law to solve for current (I): I = V / R.

Let's calculate the current through each resistor:

- Current through the first resistor (I1) = V1 / R1 = 220 V / 12 Ω = 18.33 A - Current through the second resistor (I2) = V1 / R2 = 220 V / 9 Ω = 24.44 A - Current through the third resistor (I3) = V1 / R3 = 220 V / 15 Ω = 14.67 A

Calculating the Total Current

The total current in a parallel circuit is the sum of the currents through each resistor. Therefore, the total current in this scenario is:

Total current (It) = I1 + I2 + I3 = 18.33 A + 24.44 A + 14.67 A = 57.44 A

Calculating the Total Resistance

The total resistance in a parallel circuit can be calculated using the formula mentioned earlier: 1/Rt = 1/R1 + 1/R2 + 1/R3.

Let's calculate the total resistance:

- 1/Rt = 1/R1 + 1/R2 + 1/R3 = 1/12 Ω + 1/9 Ω + 1/15 Ω - 1/Rt = (5/60 + 4/60 + 3/60) Ω = 12/60 Ω = 1/5 Ω - Rt = 5 Ω

Summary of Results

Based on the calculations, we have the following results:

- Voltage across each lamp: 220 V - Total voltage: 220 V - Current through the first lamp: 18.33 A - Current through the second lamp: 24.44 A - Current through the third lamp: 14.67 A - Total current: 57.44 A - Total resistance: 5 Ω

Please note that these calculations assume an ideal circuit with no other factors affecting the values.