Правка разделов «Statement», «Solution», «Answer»
en/11.3.20.md
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| ### Statement | |||
| − | $11.3.20.$ | ||
| + | $11.3.20.$ Explain the design of the laboratory | ||
| + | control transformer shown in the figure. How does the voltage at the transformer output changewhen the contact $K$ is moved to the left? | ||
| ### Solution | |||
| The figure shows the so-called autotransformer, its feature is that the input and output windings are combined into one. | |||
| − | The essence of the operation of such a transformer is as follows: the input voltage is applied to a fixed section of the winding, let the number of turns on it be N_1. The output voltage is removed between the common wire and terminal | ||
| + | The essence of the operation of such a transformer is as follows: the input voltage is applied to a fixed section of the winding, let the number of turns on it be $N_1$. The output voltage is removed between the common wire and terminal $K$, denote the number of turns between them $N_2$. | ||
| − | The bottom line is that the output voltage increases proportionally as N_2 increases.: | ||
| + | The bottom line is that the output voltage increases proportionally as $N_2$ increases.: | ||
| $$U = \frac{N_2}{N_1} U_0$$ | |||
| Therefore, when moving the terminals to the left, the output voltage will increase. | |||
| #### Answer | |||
| − | |||
| + | The output voltage will increase | ||
| @@ -1,20 +1,21 @@ | |||
| ### Statement | ### Statement | ||
| $11.3.20.$ |
$11.3.20.$ Explain the design of the laboratory | ||
| control transformer shown in the figure. How does the voltage at the transformer output changewhen the contact $K$ is moved to the left? | |||
| ### Solution | ### Solution | ||
| The figure shows the so-called autotransformer, its feature is that the input and output windings are combined into one. | The figure shows the so-called autotransformer, its feature is that the input and output windings are combined into one. | ||
| The essence of the operation of such a transformer is as follows: the input voltage is applied to a fixed section of the winding, let the number of turns on it be N_1. The output voltage is removed between the common wire and terminal |
The essence of the operation of such a transformer is as follows: the input voltage is applied to a fixed section of the winding, let the number of turns on it be $N_1$. The output voltage is removed between the common wire and terminal $K$, denote the number of turns between them $N_2$. | ||
| The bottom line is that the output voltage increases proportionally as N_2 increases.: | The bottom line is that the output voltage increases proportionally as $N_2$ increases.: | ||
| $$U = \frac{N_2}{N_1} U_0$$ | $$U = \frac{N_2}{N_1} U_0$$ | ||
| Therefore, when moving the terminals to the left, the output voltage will increase. | Therefore, when moving the terminals to the left, the output voltage will increase. | ||
| #### Answer | #### Answer | ||
| The output voltage will increase | |||