Consider a wire of length l, area of cross section A, and resistivity `rho` with resistance `10 Omega`. Its length is increased by applying a force, and it becomes four times of its original value. Find the changed resistance of the wire.

Explanation

To find the changed resistance of the wire when its length is increased to four times its original value, we can follow these steps:

### Step 1: Understand the formula for resistance
The resistance \( R \) of a wire is given by the formula:
\[ R = \frac{\rho L}{A} \]
where:
...