A) \[3\times {{15}^{-23}}\]joule
B) \[-3.84\times {{10}^{-23}}\]joule
C) \[-6\times {{W}^{23}}\]joule
D) \[-2\times {{10}^{-}}^{26}\]joule
Correct Answer: B
Solution :
For an electric dipole to be in stable equilibrium, we have Potential energy \[U=-pE\] \[=-2qlE\] \[=-q\times 2l\times E\] Here:\[q=3.2\times {{10}^{-19}}\]coulomb, \[2l=2.4{\AA}\] \[=2.4\times {{10}^{-10}}m\] \[E=5\times {{10}^{5}}volt/metre\] \[\therefore \]\[U=-3.2\times {{10}^{-19}}\times 2.4\times {{10}^{-10}}\times 5\times {{10}^{5}}J\] \[=-3.84\times {{10}^{-23}}J\]You need to login to perform this action.
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