Question

The primary of a step-down transformer connected to a 240 V source has 1500 turns. The secondary has 200 turns. What is the output voltage of this transformer?

Answer 1

The relation of voltage and coil turns on an ideal transformer can be written as:

$\frac{V_1}{V_2}=\frac{N_1}{N_2}$

Thus, for our data we can replace the values and we'll get:

$\frac{240}{V_2}=\frac{1500}{200}\Rightarrow V_2=32V$

Thus, the output will be 32V