Question

При подключении к батарее сопротивления 16 Ом сила тока в цепи равна 1А, а при подключении сопротивления 8 Ом — 1,8 А. Найти ЭДС и внутреннее сопротивление батареи. СРОЧНО НАДО. ПОМОГИТЕ

Answer 1

По формуле силы тока в цепи
I = E/(R + r), где R - внешнее сопротивление, а r = внутреннее
Подставляем
1 = E/(16 + r)
1.8 = E/(8 + r)
Решаем систему уравнений:
E = 16 + r
(16 + r)/(8 + r) = 1,8
r = 2ом
Ответ: 2 ом

Answer 2

E=rI1+R1I1;  (r - внутреннее сопротивление, E - ЭДС)
E=rI2+R2I2; 
rI1+R1I1=rI2+R2I2;
r(I-I2)=R2I2-RI1;
r=(R2I2-R1I1)/(I1-I2);
r=(8*1.8-16*1)/(1-1.8);
r=2 Ом.
из первого уравнения находим ЭДС: E=2*1+16*1=18 В.

Answer 3

Calculation of EDS and Internal Resistance of the Battery

To find the electromotive force (EDS) and internal resistance of the battery, we can use Ohm's Law and the concept of equivalent resistance.

Let's denote the EDS of the battery as E and the internal resistance as r.

When the resistance connected to the battery is 16 Ω and the current in the circuit is 1 A, we can use Ohm's Law to write the equation:

E = I * (R + r)

where: - E is the electromotive force (EDS) of the battery, - I is the current in the circuit (1 A), - R is the external resistance (16 Ω), and - r is the internal resistance of the battery.

Substituting the given values, we have:

E = 1 A * (16 Ω + r) ---(Equation 1)

Similarly, when the resistance connected to the battery is 8 Ω and the current in the circuit is 1.8 A, we can write another equation:

E = 1.8 A * (8 Ω + r) ---(Equation 2)

To solve for E and r, we can set the two equations equal to each other:

1 A * (16 Ω + r) = 1.8 A * (8 Ω + r)

Simplifying the equation:

16 Ω + r = 1.8 * 8 Ω + 1.8r

16 Ω + r = 14.4 Ω + 1.8r

0.2r = 1.6 Ω

r = 1.6 Ω / 0.2

r = 8 Ω

Now that we have found the value of r, we can substitute it back into Equation 1 to find the value of E:

E = 1 A * (16 Ω + 8 Ω)

E = 1 A * 24 Ω

E = 24 V

Therefore, the electromotive force (EDS) of the battery is 24 V and the internal resistance is 8 Ω.

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