Question

Explain electronic theory of frictional charges...

Answer 1

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According to this theory,

When two bodies rubbed with each other , electrons are transferred from the material with lower work function to the material with higher work function.

$\bold{Work\: function}$ :- Energy required to remove an electron from the surface of the material.
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Answer 2

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Electricity is basically flow of charge, current being defined as rate of flow of charge. Hence if any two appropriate pairs of material are rubbed together, there will be exchange of number of electrons. Now if any one object gets positively charged it is ready to discharge and become neutral almost instantly, by absorbing electrons from any surface that can provide electrons. Hence if you connect a positively charged object to earth, charge will flow to the earth instantly. That's what we can call electricity.

The same can be explained for a negatively charged body. All we need to say more is that in some pairs of objects rubbed together, we get a pair of well charged bodies. These work well to demonstrate the frictional electricity. Friction just helps to relocate the electrons in different materials.

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