Physics for IGCSE & O level - Magnets And Currents (Section 4 - No. 6)
What is the purpose of the iron core in a transformer?
To increase the efficiency of the transformer by channeling the magnetic flux.
To decrease the power output.
To insulate the coils.
To act as a resistor.
Vysvětlení
The iron core enhances the transformer's efficiency by providing a low-reluctance path for the magnetic flux.