What is dielectric constant for an insulating medium?

Explanation

To find the dielectric constant for an insulating medium, we can follow these steps:

### Step 1: Understand the Definition
The dielectric constant (k) is defined as the ratio of the electric permeability (ε) of a medium to the electric permeability of free space (ε₀). Mathematically, this can be expressed as:
\[ k = \frac{\varepsilon}{\varepsilon_0} \]

### Step 2: Identify the Values
For an insulating medium, the dielectric constant (k) is always greater than or equal to 1. This is because the presence of the insulating medium reduces the electric field compared to that in a vacuum.
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