Find inductive reactance of the inductor when it is connected in D.C. circuit.

Answer

To find the inductive reactance of an inductor when it is connected to a DC circuit, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Inductive Reactance**:
- Inductive reactance (X_L) is given by the formula:
\[ X_L = \omega L \]
where \( \omega \) is the angular frequency and \( L \) is the inductance of the inductor.

2. **Identify the Frequency in a DC Circuit**:
- In a DC circuit, the current is constant over time, which means that the frequency (f) is zero. The relationship between angular frequency and frequency is:
\[ \omega = 2\pi f \]

3. **Substitute the Frequency into the Reactance Formula**:
- Since the frequency \( f = 0 \) in a DC circuit, we can substitute this into the equation for angular frequency:
\[ \omega = 2\pi \times 0 = 0 \]

4. **Calculate the Inductive Reactance**:
- Now substituting \( \omega = 0 \) into the inductive reactance formula:
\[ X_L = 0 \times L = 0 \]

5. **Conclusion**:
- Therefore, the inductive reactance of the inductor when connected to a DC circuit is:
\[ X_L = 0 \, \Omega \]

### Final Answer:
The inductive reactance of the inductor when it is connected in a DC circuit is \( 0 \, \Omega \).