Solve this numerical sir and tell me concept behind it

Asked by spuneet23 | 9th May, 2009, 01:48: PM

Expert Answer:

Let the angle between the two strings be x, tension in string be T and charge on each sphere be q.

We have,

length of chord=r=0.04=2(0.4)sinx/2

x=2sin-10.05 =5.7320

Now writing equations in horizontal and vertical repectively

,Tcosx/2=mg

Tsinx/2=kq2/r2

Dividing the two equations and solving for q,

q=(r2mgtanx/2 /k)0.5 =(0.0016*0.02*10tan2.866/9*109)=4.22*10-8 C

Answered by  | 31st May, 2009, 10:58: AM

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