3.2 Comparision between coulomb's force and gravitational force

  Electrostatics

    1.0 Introduction
    2.0 Electric charge
    3.0 Coulomb's law
    4.0 Principle of superposition
    5.0 Continuous charge distribution
    6.0 Electric field
    7.0 Electric field lines
    8.0 Insulators and conductors
    9.0 Gauss's law
    10.0 Work done
    11.0 Electric potential energy
    12.0 Electric Potential
    13.0 Electric dipole

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3.2 Comparision between coulomb's force and gravitational force

• Coulomb force and gravitational force follow the same inverse square law.
  $${F_C} = \frac{1}{{4\pi {\varepsilon _0}}}\frac{{{q_1}{q_2}}}{{{r^2}}}\quad \quad {F_G} = \frac{{G{m_1}{m_2}}}{{{r^2}}}$$
  
  
• Coulomb force can be attractive or repulsive while gravitational force is always attractive.
  
  
• Coulomb force between the two charges depends on the medium between two charges while gravitational force is independent of the medium between the two bodies.
  
  
• The ratio of coulomb force to the gravitational force between two protons at same distance apart is,
  $$\frac{{{F_C}}}{{{F_G}}} = \frac{{{e^2}}}{{4\pi {\varepsilon _0}G{m_p}{m_p}}} = 1.3 \times {10^{36}}$$