A straight electric field line is supposed to represent a constant electric field. Does your data for both configurations, more or less, agree with this

Yes, the electric field is uniform.

Explanation:

The region around a charge in which another charge particle experiences a force is called electric field.

The electric field strength is given by force experienced by per unit charge.

A line charge produces an electric field and the electric field is uniform.

The electric field due to a line charge is

where, r is the distance and k is the constant.  

and 1and 1

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.