Question

ПОЖАЛУЙСТА СРОЧНО ДАЮ 25 БАЛЛОВ ПОМОГИТЕ!!! В некоторой цепи с внешним сопротивлением R1 = 41 Ом есть источник с ЭДС E = 187 В. Затем внешнее сопротивление этой цепи меняют на R2 = 66 Ом. Если известно, что изначальная сила тока в цепи I1 = 5,6 А, то после изменения внешнего сопротивления сила тока I2 станет равной ... А.

Answer 1

Відповідь:

мы получим ток I2=3.48A

Пояснення:

зависимость тока от сопротивления- обратно пропорциональная, чем меньше сопротивление,-тем больше ток, и наоборот. Запишем это так: R2:R1 как I1:I2 теперь решим зависимость:66/41=5,6/Х    Х=41*5,6/66=3,48

Answer 2

Calculation of Current in the Circuit

To calculate the current in the circuit after changing the external resistance, we can use Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance.

The formula for calculating current is:

I = E / R

Where: - I is the current in the circuit, - E is the electromotive force (EMF) or voltage of the source, and - R is the resistance in the circuit.

Given: - Initial external resistance, R1 = 41 Ω - EMF of the source, E = 187 V - Initial current in the circuit, I1 = 5.6 A

Using the formula, we can calculate the initial current in the circuit:

I1 = E / R1

Substituting the given values:

5.6 A = 187 V / 41 Ω

Now, let's calculate the current in the circuit after changing the external resistance to R2 = 66 Ω.

I2 = E / R2

Substituting the given values:

I2 = 187 V / 66 Ω

To find the value of I2, we need to perform the calculation.

Calculation of I2

To calculate the value of I2, we divide the voltage (E) by the resistance (R2).

Using the given values:

I2 = 187 V / 66 Ω

Performing the calculation:

I2 ≈ 2.83 A

Therefore, after changing the external resistance to 66 Ω, the current in the circuit (I2) will be approximately 2.83 A.

Please note that the calculations provided are based on the given information and assumptions.