Question

В сеть вкл. параллельно 60 ламп накаливания сопротив-ем 270 Ом каждая. Определить общую силу тока и напряжения в сети, если напряжение на лампах 220В, а сопротивление подводящих проводов 0,33 Ом.

Answer 1

Поскольку все лампы одинаковые и соединены ПАРАЛЛЕЛЬНО, то общее сопротивление ламп:
R = 270/60 = 4,50 Ом
Сила тока:
I = U/R = 220/4,50 ≈  48,9 А

Учтем падение напряжения на проводящих проводах:
ΔU = I*Rпр = 48,9*0,33 ≈ 16 В

Напряжение в сети
Uc = U+ΔU = 220+16=236 В

Answer 2

Calculation of Total Current and Voltage in the Circuit

To determine the total current and voltage in the circuit, we need to consider the parallel connection of 60 incandescent lamps with a resistance of 270 ohms each, a voltage of 220V across the lamps, and a resistance of 0.33 ohms for the connecting wires.

In a parallel circuit, the voltage across each component is the same, while the total current is the sum of the currents flowing through each component.

To calculate the total current, we can use Ohm's Law, which states that the current (I) flowing through a component is equal to the voltage (V) across the component divided by the resistance (R) of the component:

I = V / R

Since the voltage across each lamp is 220V and the resistance of each lamp is 270 ohms, the current flowing through each lamp can be calculated as:

I_lamp = V_lamp / R_lamp = 220V / 270Ω

To calculate the total current in the circuit, we sum up the currents flowing through each lamp:

I_total = 60 * I_lamp

Now, let's calculate the total current:

I_total = 60 * (220V / 270Ω)

To calculate the total voltage in the circuit, we need to consider the voltage drop across the connecting wires. The resistance of the connecting wires is given as 0.33 ohms. The voltage drop across the wires can be calculated using Ohm's Law:

V_wire = I_total * R_wire = I_total * 0.33Ω

The total voltage in the circuit is the sum of the voltage across the lamps and the voltage drop across the wires:

V_total = V_lamp + V_wire

Now, let's calculate the total voltage:

V_total = 220V + (I_total * 0.33Ω)

Calculation Results

Using the given values, we can now calculate the total current and voltage in the circuit:

Total Current (I_total) = 60 * (220V / 270Ω)

Total Voltage (V_total) = 220V + (I_total * 0.33Ω)

Please note that the exact numerical values of the total current and voltage depend on the specific calculations using the given values.