Thanks Guys;
NJ thanks for your concern but to be honest I chose Electronics as an extra lesson to learn something extra but it appear to be extra hard for me as I dont have any background at all and I really dont have any interest so Im just looking forward to pass it with minimum mark.
I'm studying "Aerospace system engineering" in Coventry, England.
BTW; just out of curiosity what can be possible source of error in this investigation, I thought of resistance in cable? is that right? any more idea ( Don't worry it just my barin going crazy its not the question)
