Very Large Capacitors Have Been Considered as a Means for Storing

question 22

Multiple Choice

Very large capacitors have been considered as a means for storing electrical energy.If we constructed a very large parallel-plate capacitor of plate area 10 m² using paper (κ = 3.7) of thickness 1.0 mm as a dielectric,how much electrical energy would it store at a plate voltage of 5000 V? (ε₀ = 8.85 × 10−¹² C²/N⋅m²)

• A) 4.1 J
• B) 8200 J
• C) 0.41 J
• D) 82,000 J

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Definitions:

Iron

A strong, hard magnetic silvery-gray metal, extensively used in construction and manufacturing, especially as a component of steel.

Isotopes

Atoms of the same element that have the same number of protons but different numbers of neutrons in their nuclei, resulting in different mass numbers.

Bromine

A halogen element with the symbol Br and atomic number 35, known for its reddish-brown color and use in flame retardants and other chemicals.

Isotope

Atoms of the same element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.