Two charged particles each of mass 5g and charge q=2μC are suspended as shown in the figure. The system is taken in a satellite. The force between the charges is:
23×10−3N
2.3×10−3N
0.23×10−3N
none of these
A
23×10−3N
B
none of these
C
2.3×10−3N
D
0.23×10−3N
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Solution
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Given : l=60 cm q=2×10−6 C
As there is no gravity, thus total distance between the charges d=2l+5=125 cm =1.25 m
Coulomb force F=Kq2d2=9×109×(2×10−6)2(1.25)2=23×10−3 N
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