Which of the following explains why international travelers need to use special adapters when plugging a device designed to operate in the u. s. into a wall outlet in europe (i. e., vrms in the u. s. is 120 v, while vrms in europe is 240 v)?
a. the increased voltage causes the device's resistance to increase, and the device won't work.
b. the increased voltage causes the device's resistance to decrease, and the device will overheat.
c. the increased voltage causes an increase in power usage, and the device will overheat.
d. the increased voltage causes a decrease in power usage, and the device won't work.

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

if i write it on a piece of paper and submit it to you would that be okay

explanation: