An experimental group has made a "220 V & nbsp; & nbsp; 22 W" electric iron, which can produce heat every minute when used under rated voltage______ J. The resistance of the electric iron is______ Ω．

An experimental group has made a "220 V & nbsp; & nbsp; 22 W" electric iron, which can produce heat every minute when used under rated voltage______ J. The resistance of the electric iron is______ Ω．

∵ P = WT, ∵ electric energy consumed by electric iron per minute: w = Pt = 22W × 60s = 1320j; ∵ P = u2r, ∵ resistance of electric iron: r = u2p = (220V) 222w = 2200 Ω; so the answer is: 1320; 2200

Meaning of 220 V or 110 V 500 W

220 V is the voltage used in China. 110 V is the voltage used in Japan. 500 W is the power of your appliance. If you use 220 V, you can use it at 110 V, but the power is low
If you use 110V electrical appliances for 220V, it will burn your electrical appliances, and it may also damage you**