POTENTIAL DIFFERENCE AND ELECTRIC FIELD HOMEWORK

Thread starter tuyenb
Start date Feb 28, 2021
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Difference Electric Electric field Field Homework Potential Potential difference

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The discussion revolves around confusion regarding the application of formulas related to potential difference and electric fields in homework. The user expresses difficulty in solving a problem and believes an example would clarify their misunderstanding. They are uncertain about their calculations and seek confirmation on the correct approach. The forum encourages users to share their attempts to facilitate better assistance. Providing an example could enhance understanding of the concepts involved.

Feb 28, 2021

tuyenb

Homework Statement: What is the magnitude of the average electric field inside the battery? Your answer should be in SI units.

Relevant Equations: See first picture please

I tried following the formula but it wasn’t correct. I’m sure I could get it if I had an example as I’m sure this must be a simple question for other people I was just unsure if I was doing it correct.

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Mar 1, 2021

haruspex

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tuyenb said:

I tried following the formula but it wasn’t correct.

Per forum rules, please post your attempt.

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...

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