P and Q are two opposite point charges. The force F acting on P due to Q and the electricfield stre

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P and Q are two opposite point charges. The force F acting on P due to Q and the electric field strength E at P are shown.
Which diagram shows the force on Q due to P and the electric field strength at Q? Here is the link for DISCORD SERVER
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  1. Prof. Varun [IB Physics SL HL] India
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we can also define what charge P and Q are. F is attractive so they are opposite and field is towards left so Q should be positive. so, the force on q should be attractive towards left and the field should be outwards, towards left again!

siddharthgianchandani
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Thanks Prof. Varun. The force makes total sense but the electric field is confusing. I saw the electric field arrow leaving P and reasoned P must be the positive particle and therefore Q must be the negative particle. I'm guessing I was wrong to think this. Since electric field lines move away from positive charge and toward negative charge I thought the answer was choice A. It seems to me that an assumption had to be made that electric field was constant for both particles but how could that be assumed especially since the content specifically teaches the direction of electric field arrows is different for opposite charges? Thanks again for making this video.

mwt
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Why is the electric field to the left, as if it's moving away from P, shouldn't P be positive and thus Q be negative? Also, how do we know that the electric field is uniform?

faithfulashlynxsurvivalthe
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Please make a video on how to determine the direction of electric field 😅

jaivasandani