3.7.5 - Magnetic fields Flashcards
1
Q
What is the function of a transformer core?
A
it provides greater linkage from primary to secondary coil compared to an air coil
2
Q
Why is 33kV not used for long-distance transmission?
A
A lower voltage will mean the power is transmitted at high current. So energy is lost in the cable due to heating
3
Q
Why is 400kV not used for long-distance transmission?
A
Too high a voltage will cause major insulation difficulties
