The characteristic impedance of a coaxial cable is of the order of

Options

A. `50 Omega`
B. `200 Omega`
C. `270 Omega`
D. none of these

Explanation

To determine the characteristic impedance of a coaxial cable, we can follow these steps:

### Step 1: Understand Characteristic Impedance
Characteristic impedance (Z₀) of a coaxial cable is defined as the ratio of the voltage to the current of a wave propagating along the cable. It is an important parameter that affects signal transmission and loss.

### Step 2: Identify Common Values
Coaxial cables are commonly used in various applications, and their characteristic impedance values typically range around certain standard values. The most common characteristic impedances for coaxial cables are 50 ohms and 75 ohms.

### Step 3: Analyze the Options
The question provides four options:
1. 50 ohm
2. 200 ohm
3. 270 ohm
4. None of these

### Step 4: Determine the Optimal Value
For RF (radio frequency) applications, a characteristic impedance of 50 ohms is often used because it provides a good balance between power handling and signal loss. This is particularly important in applications like antennas and transmission lines.

### Step 5: Conclusion
Given that 50 ohms is the standard for minimizing loss in coaxial cables, we can conclude that the characteristic impedance of a coaxial cable is of the order of 50 ohms.

### Final Answer
The correct option is **50 ohm**.

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