Question

# Fg and Fe represent gravitational and electrostatic force respectively between electrons situated at a distance 0.1m.Fg/Fe is of the order

A
1041
B
1045
C
1040
D
1042
Solution
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#### Fy and Fe represent gravitational and electrostatic force respectively between electrons situated at a distance =0.1mlet, us take the ratioFeFg=14πϵ0q2d2Gm2d2FeFg=14πϵ0×1G×q2m2FeFg=9×109×16.67×10−11×(1.6×10−19)2(9.1×10−31)2⇒FeFg=4.17×1042or, FeFg is of the order of 10−42.

5
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