A long cylindrical wire carries a positive charge of linear density `2.0 x 10^(-8) C m^(-1). An electron revolves around it in a circular path under the influence of the attractive electrostatic force. Find the kinetic energy of the electron. Note that it is independent of the radius.

Explanation

To find the kinetic energy of the electron revolving around a long cylindrical wire with a positive charge, we can follow these steps:

### Step 1: Understand the System
We have a long cylindrical wire with a linear charge density \( \lambda = 2.0 \times 10^{-8} \, \text{C/m} \). An electron revolves around this wire in a circular path due to the electrostatic force.

### Step 2: Calculate the Electric Field
The electric field \( E \) at a distance \( R \) from an infinitely long charged wire is given by the formula:
\[
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