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A small sphere is charged unifomly and placed at some point A(x_0,y_0) so that at point B(9m,4m) electric field strength is vec E = (54 hati + 72 hatj)NC^(-01) and potential is 1800V. Then |
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Answer» the magnitude of chargeon the sphere is `4muC` `vecE=54hati+74hatj,E=90NC^(-1)` `90=(9xx10^(-9)Q)/(R^(2)` `V=1800=(9xx10^(9)Q)/(r)` From Eqs. (i) and(ii), we get `r=20M,q=4muC` Now, `((9-x_(0))+(4-y_(0))hatj)/(20)=(54hatj+72hatj)/(90)` or `x_(0)=3,y_(0)=-12` |
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