What is meant by saying a potential is localized? a) the potential must increase until it reaches zero then remain constant. b) the potential must be negative or less surrounding a positive potential. c) the potential must be a delta function potential. d) the potential is constant over some region of space. e) the potential effectively goes to zero at some distance from its center.

your answer is c! hope this : )

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

it is a negative acceleration

the answer is 12 as i may remember

: )