Electrical power is transmitted from power stations to consumers over long distances using high-voltage overhead cables.
Why is high voltage used for the transmission of electrical power?
High voltage increases the electrical resistance of the cables, making them safer.
High voltage reduces the current flowing through the cables, thereby minimizing energy lost as heat.
High voltage increases the speed of electrons, which reduces the time taken for electrical energy to reach its destination.
High voltage generates large magnetic fields that help repel lightning strikes.
136 exam-style questions on CIE IGCSE Physics 4.5.6a Construction and operation of a transformer. Each one has a worked solution and a mark scheme showing where the marks go.