A Capacitor in an RC Circuit Is Charged, Storing 1

question 21

Multiple Choice

A capacitor in an RC circuit is charged, storing 1.25 mJ of energy. What is the time required to discharge this capacitor (say, to 1% of its initial charge) , as compared to the time required to discharge (to 1%) an identical capacitor in an identical RC circuit which has stored 2.5 mJ of energy instead?

• A) twice the time
• B) half the time
• C) the same time
• D) the answer depends on the values of R and C.

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Definitions:

Fossil Record

The collection of fossils, which serves as historical documentation of past life and environments on Earth.

Pollen Grains

Microscopic structures produced by the male parts of plants, responsible for carrying male gametes to the female part for fertilization.

Progymnosperms

An extinct group of plants that are considered to be the ancestors of both gymnosperms and angiosperms, showing features typical of both groups.

Megaphylls

Leaves with a highly branched vascular system, characteristic of most modern plants, contrasted with microphylls of some ancient lineages.