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Question

The ratio of magnitude of electrostatic force and gravitational force for an electron and proton is
  1. 2.4×1039
  2. 19.2×1029
  3. 6.6×1029
  4. 6.6×1039

A
6.6×1039
B
2.4×1039
C
19.2×1029
D
6.6×1029
Solution
Verified by Toppr

Here, for an electron and a proton
Electrostatic force, |Fe|=14πε0e2r2
Gravitational force, Fg=Gmempr2
|Fe|Fg=14πε0e2Gmem=9×109×(1.6×1019)26.67×1011×9×1031×1.66×1027=2.4×1039

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