Each Plate of a Parallel-Plate Air-Filled Capacitor Has an Area

question 32

Multiple Choice

Each plate of a parallel-plate air-filled capacitor has an area of 0.0020 m², and the separation of the plates is 0.020 mm. An electric field of 3.9 × 10⁶ V/m is present between the plates. What is the surface charge density on the plates? (ε₀ = 8.85 × 10-12 C²/N ∙ m²)

• A) 35 µC/m²
• B) 73 µC/m²
• C) 17 µC/m²
• D) 52 µC/m²
• E) 87 µC/m²

---

Definitions:

Military Commissions Act

A U.S. law passed in 2006 that authorized the trial by military commission of foreign enemy combatants and limited their access to habeas corpus challenges.

Enemy Combatant

An individual engaged in hostilities against a state, who does not qualify as a lawful combatant under the laws of war.

Hamdi v. Rumsfeld

A landmark Supreme Court case decided in 2004 that recognized the power of the government to detain enemy combatants, including U.S. citizens, but also established detainees' rights to challenge their detention.

Foreign Intelligence

Information relating to the capabilities, intentions, or activities of foreign governments or non-state actors.