A) \[-\,8.6\times {{10}^{5}}N{{C}^{-1}}\]
B) \[8.6\times {{10}^{4}}N{{C}^{-1}}\]
C) \[-\,6.7\times {{10}^{5}}N{{C}^{-1}}\]
D) \[6.7\times {{10}^{4}}N{{C}^{-1}}\]
Correct Answer: C
Solution :
[c] Here, \[\ell =2.4m,r=4.6mm=4.6\times {{10}^{-3}}m\] \[q=-4.2\times {{10}^{-7}}C\] Linear charge density, \[\lambda =\frac{q}{\ell }\] \[\frac{-4.2\times {{10}^{-7}}}{2.4}=-1.75\times {{10}^{-7}}C{{m}^{-1}}\] Electric field, \[E=\frac{\lambda }{2\pi {{\varepsilon }_{0}}r}\] \[=\frac{-1.75\times {{10}^{-7}}}{2\times 3.41\times 8.854\times {{10}^{-12}}4.6\times {{10}^{-3}}}\] \[=-6.7\times {{10}^{5}}N{{C}^{-1}}\]You need to login to perform this action.
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