Question

При напряжении 220 В в лампе в течение 4 мин выделено 14,4 кДж энергии. Определите сопротивление нити лампы.

Answer 1

808,8 Ом ааладдвдвдащвщдвд

Answer 2

Calculation of Resistance

To determine the resistance of the lamp filament, we can use the formula:

Energy = Power x Time

The power can be calculated using the formula:

Power = Voltage^2 / Resistance

Given that the voltage is 220 V, the time is 4 minutes (or 240 seconds), and the energy is 14.4 kJ, we can calculate the power:

Power = Energy / Time

Power = 14.4 kJ / 240 s

Converting kJ to J:

Power = 14.4 kJ * 1000 J/kJ / 240 s

Power = 60 J/s

Now, we can calculate the resistance:

Resistance = Voltage^2 / Power

Resistance = 220 V^2 / 60 J/s

Resistance = 4840 V^2 / 60 J/s

Resistance = 80.67 Ω

Therefore, the resistance of the lamp filament is approximately 80.67 Ω.