Physics for IGCSE & O level - Magnets And Currents (Section 9 - No. 39)
If a transformer has a turns ratio of 1:2 and the input voltage is 10 V, what is the output voltage?
5 V
10 V
20 V
40 V
คำอธิบาย
A turns ratio of 1:2 means the output voltage is twice the input voltage.