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When a household incandescent lamp works normally with a current of 0.2 a, how many joules does the current work on the lamp and how many joules does the current consume per minute
At 220 V: work done by current to lamp = consumed electric energy w = uit = 220 * 0.2 * 60 seconds = 2640 watts seconds = 2640 joules
A lamp marked "pz220w 100W" has a current of a when it works normally, and 1 kwh of electric energy can make the lamp work normally
Please explain the method and the answer when you answer
p=UI
Current: I = P / u = 100 / 220 = 0.45 (a)
Time: T = w / P = 1 kwh / 0.1 kW = 10 hours
"Pz220w 100W" you write wrong, should be "pz220v 100W", PZ means general lighting (the initial consonant of general lighting), 220V means rated voltage, 100W means rated power, that is, the normal working voltage is 220V, the power is 100W
An incandescent bulb marked pz220-40, its rated voltage is () rated power is () normal operation for 5 hours, power consumption is () kwh?
There is a calculation process, the reason is shown later, with formula
A incandescent bulb marked with pz220-40 has rated voltage of (220) and rated power of (40) and consumes electric energy of (0.2) kwh for 5 hours of normal operation. Pz220-40 220 is rated voltage and 40 is rated power. 40W = 0.04kw, w = Pt = 0.04kw × 5 = 0.2KW · h. I don't understand. I'll continue to ask you
What is the normal working current of an electric lamp with pz220100? How many hours can 1kW. H electric energy make the lamp work normally?
100 △ 220 is the current
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