A) \[2\times {{10}^{-6}}N\]
B) \[4\times {{10}^{-6}}N\]
C) \[6\times {{10}^{-6}}N\]
D) \[8\times {{10}^{-6}}N\]
Correct Answer: D
Solution :
Electric field \[E=-\frac{dV}{dx}=-\frac{d}{dx}(5+4{{x}^{2}})=-8x\] Force on charge \[(-q)=-qE=8qx\] At \[x=0.5\,m,\] Force\[=8\times 2\times {{10}^{-6}}\times 0.5=8\times {{10}^{-6}}N.\] Hence, the correction option is (d).You need to login to perform this action.
You will be redirected in
3 sec