A 120-V electrical line in a home is connected to a 100-W lightbulb, a 180-W television set, a 230-W desktop computer, a 1050-W toaster, and a 240-W refrigerator. How much current is flowing in the line

Explanation:

It is known that relation between voltage and power is as follows.

                Power (P) = Voltage (V) × Current (I)

or,               I =

Since, it is given that the elements are in parallel so the currents will get added. Therefore, total current in the line will be as follows.

       I =

         =

         =

         = 15 A

Therefore, we can conclude that 15 ampere current is flowing in the line.

false br

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