A) \[7.5\times {{10}^{7}}N{{C}^{-1}}\]
B) \[7.2\times {{10}^{7}}N{{C}^{-1}}\]
C) \[6.2\times {{10}^{7}}N{{C}^{-1}}\]
D) \[6.5\times {{10}^{7}}N{{C}^{-1}}\]
Correct Answer: B
Solution :
[b] Charge on the element opposite to the gap is \[dq=\frac{Q}{2\pi r}\left( 0.002\pi \right)\] \[=\frac{1}{2\pi \left( 0.5 \right)}\times \frac{2\pi }{1000}=2\times {{10}^{-3}}C\] \[E=\frac{9\times {{10}^{9}}\times 2\times {{10}^{-3}}}{{{\left( 0.5 \right)}^{2}}}=7.2\times {{10}^{7}}N{{C}^{-1}}\]You need to login to perform this action.
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