The electric potential V ( in volt) varies with x ( in meter) a according to the reltion ` V = 15 + 4x^(2)` . The force experience by a negative charge of 2 c located at x= 5 m is n N. Find n.

Explanation

To solve the problem, we need to find the force experienced by a negative charge of 2 Coulombs located at \( x = 5 \, \text{m} \) when the electric potential \( V \) is given by the equation \( V = 15 + 4x^2 \).

### Step-by-Step Solution:

1. **Find the Electric Field \( E \)**:
The electric field \( E \) is related to the electric potential \( V \) by the formula:
\[
E = -\frac{dV}{dx}
...