Displacement current flows in

Options

A. Resistannce only
B. Capacitor only
C. Inductor only
D. All of these

Answer

To solve the question "Displacement current flows in," we need to understand the concept of displacement current as introduced by James Clerk Maxwell.

### Step-by-Step Solution:

1. **Understanding Displacement Current**: Displacement current is a term introduced by Maxwell to account for the changing electric field in regions where there is no conduction current. It is particularly relevant in situations involving capacitors.

2. **Capacitors and Electric Fields**: In a capacitor, when a voltage is applied, an electric field is established between the plates of the capacitor. This electric field changes over time if the voltage is varying.

3. **Maxwell's Hypothesis**: Maxwell proposed that even in the absence of a physical current (like in the case of a capacitor where there is no conduction current through the dielectric), there is still a current-like effect due to the changing electric field. This is termed as displacement current.

4. **Application of Varying Voltage**: When a varying voltage is applied to a capacitor, the electric field between the plates changes with time. According to Maxwell's equations, this changing electric field produces a displacement current.

5. **Conclusion**: Therefore, the displacement current flows in a capacitor when a varying voltage is applied across its plates.

Thus, the correct answer to the question is that displacement current flows in a capacitor.

### Final Answer:
Displacement current flows in a capacitor.

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