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| Numerical 04 |
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| 04. Charges of +20 esu, +9 esu and -5 esu are placed at the corners A, B and C respectively of a DABC shown in the figure. Calculate the potential at the midpoint O of BC. |
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| Suggested answer: |
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| Potential at O due to +20 esu of charge is |
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| Potential at O due to +9 esu of charge is |
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| = +4.5 esu of potential |
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| Potential at O due to -5 esu of charge is |
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| =-2.5 esu of potential |
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| \ Total potential at O = (2.582 + 4.5 - 2.5) esu of potential |
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| = 4.582 esu of potential |
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