من فضلكو يا جماعة انا عايز ايجابة مسألة في امتحان مصر لسنة 82
انا هكتبها بالانجليزي هنا و حلوها بالانجليزي او العربي عادي يعني
it is requird to transfere a power of 80 kilowatt from a power station to a factory of distance 2 km. , If the Potential difference
at the station is 400 volts , the resistance of one kilometeter from the wire is 0.1 Ω .
Find : (A) The power lost . (B) If a step UP transformer is used at the station increase voltage to 2000 volts, Find the lost power in this Case