The unit `ohm^(-1)` is used for

Options

A. Molar conductivity
B. Equivalent conductivity
C. Specific conductivity
D. Conductivity

Explanation

To determine what the unit `ohm^(-1)` represents, we can follow these steps:

### Step 1: Understand the unit `ohm`
- The unit `ohm` (Ω) is the unit of electrical resistance. It is defined as the resistance between two points when a constant potential difference of one volt (1 V) applied across them produces a current of one ampere (1 A).

### Step 2: Inverse of ohm
- The unit `ohm^(-1)` is the inverse of resistance. Mathematically, this can be expressed as:
\[ \text{Conductance} = \frac{1}{\text{Resistance}} = \frac{1}{\Omega} \]
- Therefore, `ohm^(-1)` is used to express conductance.

### Step 3: Relate conductance to conductivity
- Conductance is often denoted by the symbol `G` and is measured in siemens (S), where 1 S = 1 ohm^(-1).
- Conductivity (σ) is a measure of how well a material conducts electricity and is related to conductance. It is defined as conductance per unit length and area.

### Conclusion
- The unit `ohm^(-1)` is used for **conductivity**.

### Final Answer
The correct option is **conductivity**.

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