Question Solved1 Answer 7. Two positive point charges P and Q are held a certain distance apart X Y Q Z At which point(s) could the electric field strength, due to the charges, be zero? A X only B. Y only C. Z only D X and Z only 8. Two point charges of magnitude +20 and are fixed at the positions shown below. At which point is the electric field due to the two charges most likely to be zero? +29 -+-+ A. B C. D. I

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Transcribed Image Text: 7. Two positive point charges P and Q are held a certain distance apart X Y Q Z At which point(s) could the electric field strength, due to the charges, be zero? A X only B. Y only C. Z only D X and Z only 8. Two point charges of magnitude +20 and are fixed at the positions shown below. At which point is the electric field due to the two charges most likely to be zero? +29 -+-+ A. B C. D. I
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Transcribed Image Text: 7. Two positive point charges P and Q are held a certain distance apart X Y Q Z At which point(s) could the electric field strength, due to the charges, be zero? A X only B. Y only C. Z only D X and Z only 8. Two point charges of magnitude +20 and are fixed at the positions shown below. At which point is the electric field due to the two charges most likely to be zero? +29 -+-+ A. B C. D. I
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7)  The electric field is always directed outwards from a positive charge. At point X, the electric field due to both the charges is towards the left. Hence, their sum can't be zero. Hence, the electric field at this point can't be zero. At the point Z, the electric field due to both the charges is towards the right. Hence, their sum can't be zero. Hence, the electric field at this point can't be zero. ATt point Y, the electric field due to P is towards the right and due to Q is towards the left. Thus, they might cancel each other out and the electric field at this point could be zero. Ans: Y only   8)  At points A and B, the electric field due to +2Q is towards the right and due to -Q, also towards the right. Hence, the electric field at points A and B can't be zero. At points C and D, the electric field is towards the right due to +2Q and towards the left due to -Q. Hence, the electric field might be zero at these points but, we have to choose only one option. Let the distance from +2Q and -Q to C be d2QC and d-QC& ... See the full answer