3energy storage consider the capacitor as a device for storing energy. the practical limitation on the potential difference between the plates of a capacitor is the "dielectric strength" of the dielectric material between the plates. this is the maximum field strength that can exist without causing a spark. it is typically on the order of 107 v/m for a good liquid dielectric with k 2.3 and ρ ~: 1 g/cm3 (a) neglecting the weight of the electrodes and case, what is the energy density of the capacitor in j/kg? le., how many joules of energy can be stored per kilogram of dielectric? physics 222 winter 2018 january 21, 2018 (b) the energy density of gasoline is about 46 mj/kg, and gasoline has a density of about 0.75 g/cm3. assume a gas tank holds about 12 gallons when full. what mass of dielectric would be required to provide the same energy as a tank of gasoline?

the answer is false

explanation:

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