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can a battery in reverse act as a resistor??? Answered

I was wondering if for example, putting a 1.5 volt battery in a 9 volt circuit, but in reverse would act as a resistor and take the 9v down to 7.5 volts?  I am too scared to try it, and just wanted to know if it has been tried before.

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frollard

Best Answer 8 years ago

Think of a battery as an electron pump. In most cases, the don't include a diode (one way valve) so they push electrons through at x volts. If you put a 1.5 in backwards, it will force 1.5 volts backwards and they will hit the 9 incoming volts and you are indeed correct, should burn off to 7.5 volts. Trouble lies in each battery will act like a short circuit and use all its might to cancel each other out, an you get real hot real fast.

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jeff-o

8 years ago

Yeah, it'll do that... until one or both batteries blow up. You're better off using a voltage regulator for the job.

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seandogue

8 years ago

People accidentally try this all the time, when they inadvertently insert one or more batteries incorrectly in electronics devices. No. it's really not a very brilliant idea. It can result in one or more batteries heating up and oozing nasty goo inside whatever you're powering.

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JamesRPatrick

8 years ago

That's not advisable. Plus resistors cost way less than batteries.