When the Potential Difference Between the Plates of an Ideal $\mathrm { V }$

question 15

Multiple Choice

When the potential difference between the plates of an ideal air-filled parallel plate capacitor is 35 $\mathrm { V }$ , the electric field between the plates has a strength of $750 \mathrm {~V} / \mathrm { m }$ . If the plate area is $4.0 \times 10 ^ { - 2 } \mathrm {~m} ^ { 2 }$ , what is the capacitance of this capacitor? $\left( \varepsilon _ { 0 } = 8.85 \times 10 ^ { - 12 } \mathrm { C } 2 / \mathrm { N } \cdot \mathrm { m } ^ { 2 } \right)$

• A) \(7.6 \times 10 ^ { - 10 } \mathrm {~F}\)
• B) \(7.6 \times 10 ^ { - 11 } \mathrm {~F}\)
• C) \(7.6 \times 10 ^ { - 12 } \mathrm {~F}\)
• D) \(7.6 \times 10 ^ { - 14 } \mathrm {~F}\)
• E) None of the other choices is correct.

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Definitions:

Graves' Disease

An autoimmune disorder that results in the overproduction of thyroid hormones (hyperthyroidism), characterized by symptoms such as enlarged thyroid, anxiety, hand tremor, heat sensitivity, weight loss, puffy eyes, and irregular heartbeat.

Autoimmune Response

Immune response that targets one’s own body tissues.

Dendritic Cell

Phagocytic white blood cell that specializes in antigen presentation during adaptive immune responses.

Naive T Cells

Immature T cells that have not yet encountered their specific antigen and thus have not been activated.