What does a president need in order to effectively exercise the informal powers of the presidency?

In order for the president to exercise the informal powers of the presidency, he or she should be able to connect and communicate with the media. In addition, the president should offer support to the public to increase the rate of approval.  These can help in gaining more satisfaction to its presidency. 

The line charge density is

Explanation:

Given that,

Diameter = 2.54 cm

Distance = 19.6 m

Potential difference = 115 kV

We need to calculate the line charge density

Using formula of potential difference

Where, r = radius

V = potential difference

Put the value into the formula

Hence, The line charge density is