Current flowing in two wires A and B of the same length is same when the same potential difference is applied across them. If conductivity of A is n times to that of B, then calculate the ratio of radii of cross section of the two wires.

Explanation

To solve the problem, we need to find the ratio of the radii of two wires A and B, given that the current flowing through them is the same when the same potential difference is applied, and the conductivity of wire A is n times that of wire B.

### Step-by-Step Solution:

1. **Understand the Relationship between Conductivity and Resistance**:
- Conductivity (\( \sigma \)) is related to resistivity (\( \rho \)) by the formula:
\[
\sigma = \frac{1}{\rho}
...