Question

Елочная гирлянда состоит из 20 ламп, каждая из которых имеет сопротивление 52 Ом и рассчитана на напряжение 13В. Определите сопротивление гирлянды и силу протекающего тока, если гирлянда включена в сеть с напряжением 220 В.

Answer 1

R = U / I 

U - напряжение ( 220 В ) 
I - сила тока 

I = U / R 

U - напряжение ( 13 В ) 
R - сопротивление ( ёлочная гирлянда -это последовательное соединение -----> 52 * 20 = 1040 Ом ) 

I = 13 / 1040 = 0,0125 A 

R = 220 / 0,0125 = 17600 Ом 

Answer 2

Calculation of the Resistance and Current in the Garland

To determine the resistance and current in the garland, we need to consider the individual resistance of each lamp and the total voltage applied to the garland.

Given: - The garland consists of 20 lamps. - Each lamp has a resistance of 52 Ω. - Each lamp is designed for a voltage of 13 V. - The garland is connected to a power source with a voltage of 220 V.

Calculation of the Resistance:

The total resistance of the garland can be calculated by summing up the resistances of all the lamps in series.

Total Resistance (R_total) = Number of Lamps (N) × Resistance per Lamp (R_per_lamp)

Substituting the given values: R_total = 20 lamps × 52 Ω/lamp

Calculation of the Current:

The current flowing through the garland can be calculated using Ohm's Law.

Current (I) = Voltage (V) / Resistance (R_total)

Substituting the given values: I = 220 V / R_total

Now, let's calculate the resistance and current in the garland.

Calculation:

- The total resistance of the garland is: - R_total = 20 lamps × 52 Ω/lamp = 1040 Ω.

- The current flowing through the garland is: - I = 220 V / R_total = 220 V / 1040 Ω ≈ 0.211 A.

Therefore, the resistance of the garland is 1040 Ω, and the current flowing through it is approximately 0.211 A.

Please let me know if there is anything else I can help#### Calculation of the Resistance and Current in the Garland

To determine the resistance and current in the garland, we need to consider the individual resistances of the lamps and how they are connected in the circuit.

Given information: - The garland consists of 20 lamps, each with a resistance of 52 Ω. - The lamps are designed for a voltage of 13 V. - The garland is connected to a power supply with a voltage of 220 V.

Resistance of the Garland

To find the total resistance of the garland, we need to consider how the lamps are connected. If the lamps are connected in series, the total resistance is the sum of the individual resistances. If the lamps are connected in parallel, the total resistance is calculated differently.

Unfortunately, the provided search results do not provide specific information on how the lamps are connected in the garland. Therefore, we cannot determine the total resistance without this information.

Current in the Garland

Similarly, without knowing the total resistance of the garland, we cannot calculate the current flowing through it using Ohm's Law (I = V/R), where I is the current, V is the voltage, and R is the resistance.

To accurately determine the current, we need to know whether the lamps are connected in series or parallel. If the lamps are connected in series, the current passing through each lamp will be the same. If the lamps are connected in parallel, the total current will be divided among the lamps.

Therefore, without additional information about the connection of the lamps in the garland, we cannot calculate the current flowing through it.

In summary, without knowing how the lamps are connected in the garland, we cannot determine the total resistance or the current flowing through it.