$k=\frac{1}{4}{}_0$

Electronic charge $e=1\mathrm{.}602{10}^{-19}C$

Mass of electron $=9\mathrm{.}11{10}^{-31}kg$

Mass of proton $=1\mathrm{.}67{10}^{-27}kg$

Attempt all question $-$ circle the right option.

$[5$ points each$]$

Which of the following is$/$are TRUE? $($circle the correct option from A to F$)$

$1.)$ Electron and proton are the smallest charge particles, the magnitude of charge on one electron or one proton is one Coulomb $(1$ C$).$

II$.$ The mass of a proton is $1800$ times the mass of an electron; however, they have the same magnitude of charge.

III. A glass rod rubbed on silk repels a small conducting sphere; this can only imply that the sphere is positively charged.

IV$.$ A charge $q_1=+4q$ attracts another charge $q_2=-q$ with a force $4$ F $,$ then charge $q_2$ attracts $q_1$ with a force $4$ F $.$

y$.$ Aluminum ion $(A{l}^{+2})$ has a charge of $+2\mathrm{.}0$ nC $.$

$(1)$ All of the above

$($b$)$ II$,$ III & IV

$($C$)$ III, IV & V

$($D$)$ I, II$,$ & V

$($E$)$ II only

$($F$)$ None of the above