Question

An American traveler in New Zealand carries a transformer to convert New Zealand’s standard 240 V to 120 V so that she can use some small appliances on her trip. What is the ratio of turns in the primary and secondary coils of her transformer?

a) 1:1
b) 2:1
c) 1:2
d) 1:√2

Answer 1

The ratio of turns in the primary and secondary coils of the transformer carried by the American traveler is 2:1.

Step-by-step explanation:

In a step-down transformer like the one the American traveler is using, the ratio of turns in the primary and secondary coils is determined by the ratio of the input and output voltages. Since the input voltage in New Zealand is 240 V and the output voltage the traveler wants is 120 V, the ratio of turns in the primary and secondary coils will be 2:1. This means that for every 2 turns in the primary coil, there will be 1 turn in the secondary coil.