Calculate the potential gradient of a potentiometer wire of length 5 m ,if resistance of the wire is `5 Omega` and current of 1.2 mA flows through it.

Explanation

To calculate the potential gradient of a potentiometer wire, we can follow these steps:

### Step 1: Understand the formula for potential gradient
The potential gradient (k) is defined as the voltage (V) across the wire divided by the length (L) of the wire.
\[ k = \frac{V}{L} \]

### Step 2: Calculate the voltage across the wire using Ohm's Law
According to Ohm's Law, the voltage (V) can be calculated using the formula:
...