You have a system of a positively and a negatively charged objects (+q and -9.) separated by distance d. (a) What is the sign of the electric potential energy? (b) What can you do to increase the electric potential energy of the system? (C) What can you do to decrease the electric potential energy of the system? Support your answer with a bar chart and mathematically. Specify initial and final states on the bar chart.

a)The sign of energy is negative, b)    we can approach the two charges, c) d ⇒ 0

Explanation:

a) The elective potential energy is

          U = k q₁q₂ / r

Applied to this case.

      U = -k q 9 / d

    U = -9 k q / d

The sign of energy is negative, which corresponds to a stable system

b) c) for the energy to be more negative we can approach the two charges

c) To increase the energetic of the system, that is to say less negative, we can separate the discharges whereby U approaches zero or we can decrease the value of the charge q.

          d ⇒ 0

are there options? cause you ain’t. real specific

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia