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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)x 2 (c)x 3 (d)1/x

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

Grade:12

2 Answers

shalini goyal
37 Points
10 years ago

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

Abhijeet Chakravarty
15 Points
10 years ago

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)

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