Question

Электрическая цепь состоит из источника тока с ЭДС 5 В и внутренним сопротивлением 1 Ом. Определить величину внешнего сопротивления, если сила тока в цепи 0,5 А. Ответ представить в Ом. СРОЧНО НУЖЕН ОТВЕТ

Answer 1

Ответ:

11 Ом

Объяснение:

Решается по формуле закона Ома для полной цепи:

$I = \frac{E}{R + r}$

Где Е - это ЭДС цепи, r - внутр. сопротивление, R - внешнее сопротивление

Получаешь:

0,5 = $\frac{5}{R + 1}$

Находишь отсюда R и получается ответ: R = 11 Ом

Answer 2

Calculation of External Resistance in an Electric Circuit

To determine the value of the external resistance in the given electric circuit, we need to consider the information provided:

- The circuit consists of a current source with an electromotive force (EMF) of 5 V. - The circuit also has an internal resistance of 1 Ohm. - The current flowing through the circuit is 0.5 A.

To find the value of the external resistance, we can use Ohm's Law, which states that the voltage across a resistor is equal to the product of the current flowing through it and its resistance:

V = I * R

In this case, the voltage across the external resistance is equal to the EMF of the current source:

V_external = EMF = 5 V

The total voltage in the circuit can be calculated as the sum of the voltage across the external resistance and the voltage across the internal resistance:

V_total = V_external + V_internal

Since the current flowing through the circuit is the same everywhere, we can use Ohm's Law to express the voltage across the internal resistance in terms of the current and the internal resistance:

V_internal = I * R_internal

Substituting the given values, we have:

V_total = V_external + V_internal = EMF + I * R_internal

Now, we can rearrange the equation to solve for the external resistance:

V_external = I * R_external

Substituting the known values, we have:

5 V = 0.5 A * R_external

Simplifying the equation, we find:

R_external = 5 V / 0.5 A = 10 Ohms

Therefore, the value of the external resistance in the circuit is 10 Ohms.

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