Question

Два проводника соединены последовательно. По цепи течет ток 7A, определите сопротивление 2-ого проводника, если сопротивление первого равно 4Ом, а общее напряжение цепи состовляет 140 В

Answer 1

7ампер по первому проводнику течет или вместе??

Answer 2

Calculation of Resistance

To determine the resistance of the second conductor in a series circuit, we can use Ohm's Law, which states that the current flowing through a conductor is equal to the voltage across it divided by its resistance.

In this case, we are given that the current flowing through the circuit is 7A, the resistance of the first conductor is 4Ω, and the total voltage across the circuit is 140V.

Using Ohm's Law, we can calculate the resistance of the second conductor as follows:

Resistance of the second conductor = Voltage across the circuit - Voltage across the first conductor / Current flowing through the circuit

Let's substitute the given values into the formula:

Resistance of the second conductor = (140V - Voltage across the first conductor) / 7A

To find the voltage across the first conductor, we can use Ohm's Law again:

Voltage across the first conductor = Current flowing through the circuit * Resistance of the first conductor

Substituting the values:

Voltage across the first conductor = 7A * 4Ω = 28V

Now we can calculate the resistance of the second conductor:

Resistance of the second conductor = (140V - 28V) / 7A = 112V / 7A = 16Ω

Therefore, the resistance of the second conductor is 16Ω.

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