when a perspex ruler is charged by rubbing with it with a cotton cloth, what kind of charge is given to the ruler and why
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The answer can be electrostatic charge
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When a plastic ruler is rubbed with a cloth, the free electrons from the cloth are transferred to the plastic ruler. The cloth on losing electrons has less number of electrons, and therefore gets positively charged the plastic ruler on the other hand has more number of electrons and thus becomes negatively charged.
The surface of the plastic ruler gets coated with the electrons rubbed off the atoms in the wool. The same effect is seen when you use a plastic comb on your hair. ... If a rod made of Perspex is rubbed on a cotton cloth, an electric charge is also produced on the rod.
The charge is electrostatic charge.
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