The mean free path of conduction electorns in copper is about `4xx10^(-8)`m. for a copper block, find the electric field which can give, on an average, 1eV energy to a conduction electron.

Explanation

To find the electric field that can give, on average, 1 eV of energy to a conduction electron in a copper block, we can follow these steps:

### Step 1: Understand the relationship between work done and energy
The work done on the electron by the electric field is equal to the energy gained by the electron. This can be expressed mathematically as:
\[ W = F \cdot d \]
where \( W \) is the work done, \( F \) is the force, and \( d \) is the distance traveled (mean free path).

### Step 2: Relate force to electric field
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