Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
Define a "Cell"
|
A device that transforms chemical energy to electrical energy.
|
|
|
What is the simplest cell?
|
galvanic or voltaic cell
|
|
|
What type of cell consists of two electrodes placed in a container that holds the electrolyte?
|
Simple cell
|
|
|
What are electrodes?
|
Conductors by which the current leaves or returns to the electrolyte.
|
|
|
What type of electrodes are in simple cells?
|
Carbon and Zinc strips.
|
|
|
What type of electrodes are in dry cells?
|
Carbon rods in the center and a zinc container.
|
|
|
What is the electrolyte?
|
The solution that acts upon the electrodes.
|
|
|
What is the purpose of the electrolyte?
|
Provides the path for electron flow.
|
|
|
In what form is the electrolyte in a galvanic cell?
|
Liquid
|
|
|
In what form is the electrolyte in a dry cell?
|
Paste
|
|
|
What is the purpose of the container?
|
To hold and/or mount the electrolyte.
|
|
|
What is the primary cell?
|
Chemical action eats away one of the electrodes, usually the negative electrode.
|
|
|
What is the secondary cell?
|
Electrode and electrolyte are altered by the chemical action that takes place when the cell delivers current.
|
|
|
What is the "Electrochemical action"?
|
Chemical energy is converted to electrical energy.
|
|
|
What is "Polarization"?
|
The chemical action that occurs in the cell while the current is flowing causes hydrogen bubbles to form on the surface of the anode.
|
|
|
What happens to a cell that is heavily polarized?
|
It has no useful output.
|
|
|
In a dry cell, what part is the negative electrode (cathode)?
|
Zinc container
|
|
|
In a dry cell, what part is the positive terminal (anode)?
|
The carbon electrode
|
|
|
In dry cell batteries, what are the two purposes of the blotting paper?
|
1. Keeps the paste from making actual contact with the zinc container. 2. Permits the electrolyte from the paste to filter through the zinc slowly.
|
|
|
What are tow important assets to a Mercuric-Oxide Zinc Cell battery?
|
Ability to produce current for a long period of time and a long shelf life.
|
|
|
What are the four types of wet cells?
|
Lead-acid, nickel-cadmium, silver-zinc, and silver-cadmium.
|
|
|
What are the three ways to combine cells to form a battery?
|
Series-connected, parallel connected, series-parallel
|
|
|
What is the specific gravity of pure water?
|
1.0
|
|
|
What device is used to measure a battery's specific gravity?
|
A Hydrometer
|
|
|
How is the capacity of a batter measured?
|
In ampere-hours
|
|
|
What is an equalizing charge?
|
A special extended normal charge that is given periodically to batteries as part of a maintenance routine.
|
|
|
What is a floating charge?
|
The charging rate is determined by the battery voltage rather than by a definite current value.
|
