A 20-μF Capacitor Is Charged to 12 V and Then Discharged

question 16

Multiple Choice

A 2.0-μF capacitor is charged to 12 V and then discharged through a 4.0 × 10⁶ Ω resistor. How long will it take for the voltage across the capacitor to drop to 3.0 V?

• A)4.5 s
• B)8.0 s
• C)11 s
• D)22 s
• E)24 s

---

Definitions:

Craniosynostosis

A birth defect in which one or more of the fibrous sutures in an infant's skull prematurely fuses, potentially affecting brain growth.

Hydrocephalus

A condition where there is an abnormal accumulation of cerebrospinal fluid (CSF) in the ventricles, or cavities, of the brain, which can increase pressure inside the skull and lead to brain damage.

Goiter

An enlargement of the thyroid gland, which can cause a visible swelling in the neck.

Iodine Deficiency

A lack of the mineral iodine in the body, leading to insufficient production of thyroid hormones, which can cause various health problems including goiter and cognitive impairments.