What claim does rodriguez make in his anecdote in line 72-98?

yes, because if hes blind not deaf

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).

in the section of speech is not

write it down

then read over it

then trun it in