$-----$A proton is placed in an electric field of intensity$810$ N$/$C$.$ What are the magnitude of the acceleration of the proton due to this field? le $=1\mathrm{.}602\backslash$times $10-19$ C$,$ Mproton $=1\mathrm{.}67\backslash$times $1027$ kg$)$D

$-----$Question $3$ What is the linear charge density of a thin wire bent into a circle $($or ring$)$ of radius $6\mathrm{.}72$ cm if the total charge on the wire is$2\mathrm{.}94$ MC$?$ Give your answer in MC$/$m$.$D

$-----$Question $4$ A circular metal plate of radius $18\mathrm{.}7$ cm carries a total charge of $5\mathrm{.}08$ MC and the charge is distributed uniformly over the surface of the plate. Determine the surface charge density on the plate and report your answer in $4$C$/$m$?.$