If a transformer has 400 turns in the primary and 200 turns in the secondary, what voltage will be measured on the secondary winding when 240 volts are applied to the primary?

To determine the voltage measured on the secondary winding of a transformer, you can use the transformer turns ratio formula, which is based on the principle that the voltage across the primary winding is proportional to the number of turns in the primary winding compared to the number of turns in the secondary winding. This can be expressed as:

[

\frac{V_p}{V_s} = \frac{N_p}{N_s}

]

where:

• (V_p) is the primary voltage,

• (V_s) is the secondary voltage,

• (N_p) is the number of turns in the primary winding, and

• (N_s) is the number of turns in the secondary winding.

In this case, the transformer has 400 turns in the primary (N_p = 400) and 200 turns in the secondary (N_s = 200). The primary voltage (V_p) is given as 240 volts.

Using this information, the turns ratio can be calculated as:

[

\frac{N_p}{N_s} = \frac{400}{200} = 2

]

This means the primary winding has twice the number of turns compared to the secondary winding. Consequently, the voltage