Hello, I am stumped on this question from my text book:(adsbygoogle = window.adsbygoogle || []).push({});

I tried by using this equation which I felt should work: A calculator is rated at 0.10 W when connected to a 1.50 V battery. What is the resistance of this device?

But it doesn't seem to get me the correct answer (which is 22 ohms). Any ideas? Thanks! (delta V)^2/R=P

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# Homework Help: What is the resistance of this device?

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