Question

ЭДС источника тока равна 1,6 В, его внутреннее сопротивление 0,5 Ом. Чему равен КПД источника при силе тока 2,4 А?

Answer 1

Полная мощность
U*I = 1.6*2.4=3.84 Вт
Мощность выделяемая на внутреннем сопротивлении
I^2* r = 2.4^2*0.5= 2.88 ,Вт
Полезная мощность
3.84-2.88= 0.96 Вт
КПД = полезная мощность / полная мощность = 0.96/ 3.84 = 0.25 или 25%

Answer 2

Calculation of Efficiency (КПД) of the Current Source

To calculate the efficiency (КПД) of the current source, we need to know the electromotive force (ЭДС) and the internal resistance (внутреннее сопротивление) of the source, as well as the current flowing through it.

Given: - Electromotive force (ЭДС) of the current source = 1.6 V - Internal resistance (внутреннее сопротивление) of the current source = 0.5 Ω - Current flowing through the source = 2.4 A

Formula for Efficiency (КПД)

The efficiency (КПД) of a current source can be calculated using the formula:

КПД = (P_out / P_in) * 100%

Where: - P_out is the power output of the source - P_in is the power input to the source

Calculation of Power Output (P_out)

The power output (P_out) of the current source can be calculated using the formula:

P_out = I^2 * R_load

Where: - I is the current flowing through the source (2.4 A) - R_load is the load resistance connected to the source

Calculation of Power Input (P_in)

The power input (P_in) to the current source can be calculated using the formula:

P_in = I^2 * (R_load + R_internal)

Where: - I is the current flowing through the source (2.4 A) - R_load is the load resistance connected to the source - R_internal is the internal resistance of the source (0.5 Ω)

Calculation Steps

1. Calculate the power output (P_out) using the formula: P_out = I^2 * R_load 2. Calculate the power input (P_in) using the formula: P_in = I^2 * (R_load + R_internal) 3. Calculate the efficiency (КПД) using the formula: КПД = (P_out / P_in) * 100%

Calculation of Power Output (P_out)

To calculate the power output (P_out), we need to know the load resistance connected to the source. Unfortunately, the load resistance is not provided in the question. Please provide the value of the load resistance so that we can proceed with the calculation.