Chapter 21, Problem 29P

To determine

The ratio of secondary to primary turns and the output voltage of the transformer.

Answer to Problem 29P

Solution:

The ratio of secondary to primary turns is $50$ and the output voltage of the transformer $4.8\text{V}$.

Explanation of Solution

Given Data:

Secondary Voltage, $V_S\text{=12}\text{kV}$

Primary voltage, $V_P=24\text{0}\text{V}$

Formula Used:

Ratio of secondary to primary turns, $\frac{N_S}{N_P}=\frac{V_S}{V_P}$

Where, $V_P$ and $V_S$ is the primary and secondary voltage respectively

Calculation:

Substituting the given values,

$\frac{N_S}{N_P}=\frac{12000}{240}=50$

Now, if the transformer is connected in reverse, then the voltage in the secondary coils,

$V_S=\frac{V_P}{50}$

$V_S=\frac{240}{50}=4.8\text{V}$