The Figure Shows a Simple RC Circuit Consisting of a 10.0-µF

question 17

Multiple Choice

The figure shows a simple RC circuit consisting of a 10.0-µF capacitor in series with a resistor.Initially,the switch is open as suggested in the figure.The capacitor has been charged so that the potential difference between its plates is 100.0 V.At t = 0 s,the switch is closed.The capacitor discharges exponentially so that 2.0 s after the switch is closed,the potential difference between the capacitor plates is 37 V.In other words,in 2.0 s the potential difference between the capacitor plates is reduced to 37 % of its original value.

-Calculate the electric potential energy stored in the capacitor before the switch is closed.

• A)0.01 J
• B)0.02 J
• C)0.03 J
• D)0.04 J
• E)0.05 J

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Definitions:

Polymers

Large molecules composed of many repeated subunits, known as monomers, which have a wide array of characteristics and uses in both natural and synthetic forms.

Steroid

Type of lipid molecule having a complex of four carbon rings—e.g., cholesterol, estrogen, progesterone, and testosterone.

Lipid Molecule

Organic molecules that are fatty acids or their derivatives and are insoluble in water but soluble in organic solvents.

Phospholipid

Molecule that forms the bilayer of the cell’s membranes; has a polar, hydrophilic head bonded to two nonpolar, hydrophobic tails.