A North American tourist takes his 22.0–W, 120–V AC razor to Europe, finds a special adapter, and plugs it into 240 V AC. Assuming constant resistance, what power does the razor consume as it is ruined?

Answer 1

R the same
i2 = 2 i1
so
i2^2 R = 4 i1^2R
4 * 22 = 88 Watts