Calculate the (a) momentum and (b) de-Broglie wavelength of the electrons accelerated through a potential difference of 56V. Given, `h=6.63xx10^(-34)Js, m_(e)=9.1xx10^(-31)kg, e=1.6xx10^(-19)C`.

Explanation

To solve the question, we need to calculate two things: (a) the momentum of the electron and (b) the de-Broglie wavelength of the electron accelerated through a potential difference of 56V.

### Step-by-Step Solution:

**(a) Calculate the momentum of the electron:**

1. **Understand the relationship between kinetic energy and potential energy:**
When an electron is accelerated through a potential difference \( V \), the kinetic energy gained by the electron is equal to the work done on it by the electric field. This can be expressed as:
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