A body has a total charge of $6.4\times {10}^{-19}$coulomb. It is :

Q.

If a body has a charge of magnitude 8 × 10^–19 coulomb. What is the correct combination of protons and electrons on it?

Q. A negatively charged particle called Negatron was discovered. In the Millikan's oil-drop experiment, the charges of the oil-drops in five experiments are reported as $3.2\times {10}^{-19}$ coulomb; $4.8\times {10}^{-19}$ coulomb; $6.4\times {10}^{-19}$ coulomb; $8\times {10}^{-19}$ coulomb and $9.6\times {10}^{-19}$ coulomb. Calculate the charge on the negatron.

Q. A conductor has $14.4\times {10}^{-19}$ coulombs positive charge. The conductor has (Charge on electron $1.6\times 10-19$coulombs )

Q. Calculate how many electrons may be removed from a body so that it may have a charge of $+1$ coulomb

Q. A body has a charge of one coulomb. The number of excess (or lesser) electrons on it from its normal state will be :