Question

Определите общую силу тока двух последовательно соединенных ламп сопротивлением по 15 Ом каждая, напряжение в сети 220в

Answer 1

R1=R2=15 Ом    U=220 B    I=?
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I=U/(R1+R2)=220/(15+15)=7.3 A
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Answer 2

Calculating Total Current in a Series Circuit

To determine the total current in a series circuit with two lamps, each with a resistance of 15 ohms, and a voltage of 220V, we can use Ohm's law and the formula for calculating total resistance in a series circuit.

Ohm's Law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R).

Calculating Total Resistance

The total resistance (R_total) in a series circuit is the sum of the individual resistances.

R_total = R1 + R2

Given that each lamp has a resistance of 15 ohms, the total resistance in the circuit is: R_total = 15 ohms + 15 ohms = 30 ohms.

Applying Ohm's Law to Find Total Current

Using Ohm's law (I = V / R), where V is the voltage and R is the resistance, we can calculate the total current (I_total) flowing through the circuit.

I_total = V / R_total I_total = 220V / 30 ohms I_total ≈ 7.33 amperes

Therefore, the total current in the circuit is approximately 7.33 amperes.