Basic Properties of Electric Charge

Figure shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?

A polythene piece rubbed with wool is found to have a negative charge of $3\times {10}^{-7 }\mathrm{C}$. Estimate the number of electrons transferred. Is there a transfer of mass from wool to polythene? (The charge of the electron, $e=-1.6\times {10}^{-19} \mathrm{C}$)

Why can one ignore the quantization of electric charge when dealing with macroscopic i.e., large-scale charges?

Explain the meaning of the statement ‘electric charge of a body is quantized’.