Current Electricity Flashcards
Electricity in motion
Current electricity
A measure of the ability to do work
Energy
Device for making electricity by chemical means
Cell
Two or more cells cells connected together
Battery
Negative plate in a cell
Cathode
Positive plate in a cell
Anode
Cell that cannot be charged
Primary cell
A cell that can be recharged
Secondary cell
Two different metals welded together that produces electricity when heated
Thermocouple
Several thermocouples connected in a series
Thermopile
A device that produces a potential difference when it receives light
Photoelectric device
Crystal that produces a potential difference as it is deformed
Piezoelectric crystal
The basic device for making electricity by chemical action is the
Electrochemical cell
The electrolyte in a dry cell is
Paste
To increase both the potential difference and the current capacity, cells can be connected in a _______ to make groups, and the groups can be connected in ________.
Series
Parallel
A lead-acid battery can _______ during recharging, because it produces a flammable gas inside.
Explode
Most of the electricity in use every day is produced by ______ and used by ______.
Generators
Motors
How does the resistance of a photoconductive cell change as the amount of light increases?
It decreases
Piezoelectric quartz crystals are widely used in devices that must operate at precisely-controlled _________.
Frequencies
If the positive electrode of one cell is connected to the negative electrode of the next, the cells are connected in
Series
Motors and generators take advantage of the close relationship between
Electricity and magnetism
