A North American tourist takes his 26.0 W, 120 V AC razor to Europe, finds a special adapter, and plugs it into 220 V AC. Assuming constant resistance, what power in watts does the razor consume as it is ruined?

Explanation:

For North America,

Power, P = 26 W

Voltage of AC razor, V = 120 V

For Europe,

Voltage of AC razor, V' = 220 V

The power of razor in North America is given by :

Let P' is the power consumed by razor in Europe. Now,

So, the razor consumed 87.38 watts of power as it is ruined.

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