An electric iron working at rated voltage has a power of 100W and a current of 454ma. What is the total rated power of the electric iron?

An electric iron working at rated voltage has a power of 100W and a current of 454ma. What is the total rated power of the electric iron?

P = u * I = u * U / r = I * I * r, select different expressions according to known conditions
100 = u * 0.454, u = 220 V, rated voltage of electric iron is 220 V, rated power is 100 W

The rated voltage of an electric iron is 220 V, and the resistance working under the rated voltage is 484. How much is its rated power? It can be produced after being electrified for 10 minutes under the rated voltage

Power P = u & # / r = 220 * 220 / 484 = 100W
Power on for 10min at rated voltage w = Pt = 100 * 10 * 60 = 60000 joules

An electric iron with a resistance of 1210 Ω is connected to the power supply of 220 v. how much heat can be generated in 2 hours

R = 1210 Ω, u = 220 V, t = 2 h = 7200 s
P=U^2/R=48400/1210=40w
Q = Pt = 40 * 7200 = 288000 watts sec = 288000 joules