A rod of length `l` is kept parallel to a long wire carrying constant current `i` . It is moving away from the wire with a velocity `v`. Find the emf induced in the wire when its distance in the wire when its distance from the long wire is `x`.

Explanation

To find the induced EMF in a rod of length \( l \) that is moving away from a long wire carrying a constant current \( i \), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Magnetic Field due to the Long Wire**:
The magnetic field \( B \) at a distance \( x \) from a long straight wire carrying a current \( i \) is given by:
\[
B = \frac{\mu_0 i}{2 \pi x}
...