How many hours can a "220 V 40 W" light bulb shine normally with 1 kW / h electric energy? The electric energy meter of Xiao Han's family is marked with the word "PZ 220 V 5A". How many "220 V 60 W" light bulbs can shine normally at the same time with this electric energy meter It's a process. Thank you

How many hours can a "220 V 40 W" light bulb shine normally with 1 kW / h electric energy? The electric energy meter of Xiao Han's family is marked with the word "PZ 220 V 5A". How many "220 V 60 W" light bulbs can shine normally at the same time with this electric energy meter It's a process. Thank you

1000 / 40 = 25 hours maximum power 220 * 5 = 1100W 1100 / 60 = 18.33 round 18

In the lighting circuit, when a bulb works normally, the resistance is R1, when it doesn't work, the resistance is R2. Which one is bigger, R1 or r2s

When working, the resistance is high. When the light is just turned on, it is the smallest, so the bulb is usually damaged when the light is turned on

The rated current of pz220-100 bulb and filament resistance work normally for 5 hours and consume electric energy of kW. H

0.45A 484Ω 0.5kwh
Rated current: I = P / u = 100W / 220V = 0.45a
Filament resistance R = u and 178 / P = (220 V) & 178 / 100 W = 484 Ω
It works normally for 5 hours and consumes electric energy w = Pt = 0.1kw * 5h = 0.5kwh

A "pz220 --- 100" bulb, filament resistance is, how many hours can it work for one degree of electricity?

484Ω 10h
R=U²/P=(220V)²/100w=484Ω
t=W/P=1kwh/0.1kw=10h