2.7a 110 v heating element in a stove can boil a standard-size pot of water in 1.2 minutes, consuming a total of 136 kjof energy. determine the resistance of the heating element andthe current flowing through it.

Resistance of the heating element: 6.4 ohm

Current flow:17.17 amperes

Explanation:

First we need to convert from Joules to Watts, in order to do that we need the time in seconds:

Then apply the formula:

Clearing watts from the equation:

Then, we know the input voltaje is 110V, and Watts= Voltage* Current.

Finally Voltaje over Current= Resistance, from ohm's law

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