Question

ЕРС батареї ε = 80 В, внутрішній опір r = 5 Ом, споживана в колі потужність P = 100 Вт. Визначити силу струму в зовнішньому колі, падіння напруги на ньому і опір кола.

Answer 1

Відповідь: Див. додаток

Пояснення: Можливі два випадки, хоча у другому випадку малий ККД

Answer 2

Calculation of Current, Voltage Drop, and Resistance

To determine the current, voltage drop, and resistance in the external circuit, we can use the given values:

- EMF of the battery (ε) = 80 V - Internal resistance of the battery (r) = 5 Ω - Power consumed in the circuit (P) = 100 W

We can start by calculating the current (I) in the external circuit. The current can be calculated using Ohm's Law, which states that the current is equal to the voltage divided by the resistance:

I = ε / (r + R)

Where: - I is the current in the external circuit - ε is the EMF of the battery - r is the internal resistance of the battery - R is the resistance in the external circuit

Next, we can calculate the voltage drop (V) across the external circuit. The voltage drop can be calculated by multiplying the current by the resistance:

V = I * R

Finally, we can calculate the total resistance (R_total) in the circuit. The total resistance is the sum of the internal resistance of the battery and the resistance in the external circuit:

R_total = r + R

Let's substitute the given values into the formulas to find the current, voltage drop, and resistance:

Current (I): I = ε / (r + R) I = 80 V / (5 Ω + R) Voltage Drop (V): V = I * R V = (80 V / (5 Ω + R)) * R V = 80 V * R / (5 Ω + R)

Total Resistance (R_total): R_total = r + R R_total = 5 Ω + R

Please provide the value of the resistance (R) in the external circuit so that we can calculate the current, voltage drop, and total resistance.