Conductivity increases in the order of

Options

A. Al, Ag, Cu
B. Al, Cu, Ag
C. Cu, Al, Ag
D. Ag, Cu, Al

Answer

To determine the order of conductivity among aluminum, copper, and silver, we can follow these steps:

### Step 1: Understand Conductivity
Conductivity is a measure of a material's ability to conduct electric current. The higher the conductivity, the better the material is at conducting electricity.

### Step 2: Identify the Conductivity of Each Material
- **Silver**: Silver has the highest conductivity among all metals. It is often considered the best conductor.
- **Copper**: Copper has high conductivity, but it is lower than that of silver. It is widely used in electrical wiring due to its good conductivity and relatively lower cost compared to silver.
- **Aluminum**: Aluminum has lower conductivity than both silver and copper. However, it is still used in some applications due to its lightweight and cost-effectiveness.

### Step 3: Arrange the Materials in Order of Increasing Conductivity
Based on the conductivity values:
1. Aluminum (least conductive)
2. Copper (moderately conductive)
3. Silver (most conductive)

### Step 4: Conclusion
The order of conductivity increases from aluminum to copper to silver. Therefore, the correct option is:
- **Aluminum < Copper < Silver**

### Final Answer
The order of conductivity increases as: **Aluminum < Copper < Silver** (Option B).

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