Flashcards in Electricity 6 Of 7 Deck (44)
The battery is the most important power source in use because?
It’s energy is self-contained
The battery is used mostly wherever a ___________ Power source is required.
The battery is also used as a _________ source of voltage in a voltage standard.
What are the two classes of battery’s?
Primary and secondary.
The __________ battery converts chemical energy into electrical energy directly, using the chemical materials within the cell to start the action.
The _________ battery must first be charged before it can convert chemical energy into electrical energy.
The secondary battery is frequently called?
A storage battery.
The ______ is the basic unit of the battery.
The ______ battery is used when limited current is required and the _________ battery is used when a heavy current is required.
The metals in a cell are called?
The amount of chemical activity that the electrolyte causes and the type of metal used for the electrodes will help determine the__________ and __________ output of the cell
Voltage and current
What is a disadvantage of the primary wet cell?
As the battery is used, the negative electrode disintegrates.
The basic primary wet cell is usually called the __________.
3, 1.5 volt batteries connected in series produces how much voltage?
How many voltage ratings do batteries have?
A no-load rating, and
A normal load rating
What determines the useful life of a cell?
The amount of current flowing through a cell.
A cell’s ratings and life depend on its _____________.
Lead-acid batteries should never be overcharged because?
Overcharging causes explosive hydrogen and oxygen gases.
When an electric charging current is applied to a lead-acid battery, one electrode turns into _____ and the other turns into ___________.
To reduce Sulfation, the lead-acid cell must be kept _________, and the electorate level must be kept at least 3/8 inch above the plates.
The state of charge can be determined by measuring the specific gravity of the electrolyte with a __________.
The photoconductive cell is basically a variable resistive device that permits more current to flow in a circuit when it is struck by____________.
A photovoltaic cell uses dissimilar __________ materials and a thermoelectric cell used dissimilar metals.
A ________ generator uses heat and chemical activity to generate a charge.
A generator produces electricity by the ____________ of a group of conductors in a magnetic field.
What are the two types of generators?
When excitation current is produced from the generators own output, the generator is a _____________ generator.
Batteries are rated according to the amount of ________ they can supply in a given amount of time.
A simple dc generator consist of 4 basic parts. What are they?
1) a magnetic field
2) a conductor, in the form of a loop
3) a commutator
4) and brushes