Question

Электрическая цепь состоит из 7 последовательно соединенных резисторов с сопротивлением 13 ом каждый. сила тока на втором резисторе 3 а. чему равно сопротивление всей цепи? общий ток и напряжение и напряжение на каждом резисторе

Answer 1

Общий ток (при последовательном соединении) и будет 3 А.
Сопротивление всей цепи (при последовательном соединении) будет равно сумме всех сопротивлений, т.е. R = 7*13 = 91 Ом.
Общее напряжение U = I*R = 3*91 = 273 В,
Напряжение на каждом резисторе u = I*r = 3*13 = 39 В.

Answer 2

Calculating Total Resistance of the Circuit

To find the total resistance of the circuit, we can use the formula for the total resistance of resistors in series, which is simply the sum of the individual resistances.

The total resistance \( R_{total} \) of resistors in series can be calculated using the formula:

Total Resistance of Series Circuit: \[ R_{total} = R_1 + R_2 + R_3 + ... + R_n \]

Given that the circuit consists of 7 resistors, each with a resistance of 13 ohms, the total resistance of the circuit can be calculated as follows:

\[ R_{total} = 7 \times 13 \]

Let's calculate the total resistance.

Calculating Total Resistance

The total resistance of the circuit is: \[ R_{total} = 7 \times 13 = 91 \, \Omega \]

The total resistance of the circuit is 91 ohms.

Current and Voltage in the Circuit

The current and voltage in the circuit can be calculated using Ohm's law and the principles of series circuits.

Current in the Circuit: The current (\( I \)) in a series circuit remains the same throughout the circuit. Therefore, the current on the second resistor is also the total current in the circuit.

Given that the current on the second resistor is 3 A, the total current in the circuit is 3 A.

Voltage in the Circuit: The voltage (\( V \)) across each resistor can be calculated using Ohm's law: \[ V = I \times R \] where \( I \) is the current and \( R \) is the resistance.

The voltage across each resistor is: \[ V = 3 \, A \times 13 \, \Omega = 39 \, V \]

Therefore, the voltage across each resistor is 39 volts.

Summary

- Total Resistance of the Circuit: 91 ohms - Total Current in the Circuit: 3 A - Voltage Across Each Resistor: 39 V