CAIE IGCSE Physics 4.5.6.5 Advantages of High Voltage Questions

Learn why high voltage reduces current and resistive energy losses in transmission lines.

Exam points

explain why electrical power is transmitted at high voltage
relate high voltage and lower current to reduced resistive energy loss
state advantages of high-voltage transmission before distribution to consumers

[Maximum number: 2]

Fig. 10.1 shows a transformer that consists of two coils P and Q, and an iron core.

Fig. 10.1

There are 200 turns on coil P and 340 turns on coil Q.

A4.0 V a.c. power supply is connected to coil P.

A transformer is used to step up the voltage before electrical energy is transmitted over long distances.

State and explain one economic effect of transmitting electrical energy at a high voltage.

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CAIE IGCSE Physics 4.5.6.5 Advantages of High Voltage Questions question 1