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shalini goyal Grade:
        

Q))Two equal chargs are ixed at x=a and x=-a on d axis.anodr pt charge Q is placed at d orign.The change in d electric potential energy of Q,when it is displaced by a small distance x along d x-axis, is approximately proportional to....


(a)x


(b)x2


(c)x3


(d)1/x

6 years ago

Answers : (2)

shalini goyal
37 Points
										

kindly give me the answer f dis ques....m tired of posting ques here....widou geettin ne answer!!

6 years ago
Abhijeet Chakravarty
15 Points
										

Initial Energy:


K Qq/a


Final Energy


K qq*2a/(a*a-x*x)


Change in energy: Final energy-initial energy


= KQq [2*x*x/(a*a-x*x)a]


The x square term in the denominator can be neglected...So the change in energy is proportional to X square.


 


The corredc answer is (b)

6 years ago
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