A Pair of Parallel Conducting Plates Have Potentials of −17

question 61

Multiple Choice

A pair of parallel conducting plates have potentials of −17 V and 55 V, respectively. An electron is ejected from the plate at potential −17 V and travels to the plate at 55 V. What is the speed of the electron as it strikes the 55 V plate, assuming it left the −17 V plate starting from rest? The mass of the electron is 9.11 × 10⁻³¹ kg.

• A) 2.2 × 10⁶ m/s.
• B) 5.0 × 10⁶ m/s
• C) 3.6 × 10⁶ m/s
• D) 3.1 × 10⁶ m/s

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Definitions:

Plasma Membrane

The lipid bilayer membrane surrounding cytoplasm of a cell, regulating the passage of substances in and out of the cell.

Water-soluble Ions

Ions that dissolve in water, important in biological processes and the functioning of cells.

Lipid-soluble Molecules

Molecules that can dissolve in fats and oils, which allows them to easily pass through cell membranes that are made of lipids.

Greater Concentration

Refers to a higher amount of a substance in a specific volume of solution or mixture when compared to another concentration.