Emf Flashcards
What does a basic battery consist of?
Two dissimilar metals and an electrolyte.
P92
How does a fuel cell work?
a) It works on electron drift due to P type material losing electrons.
P92 Fiction are pushed on reicion. i embosiot.
A battery can be a:
a) Constant current device.
P9 г
In a thermocouple circuit what determines the magnitude of the voltage generated and the polarity?
It is a function of the temperature difference between the junctions and of the thermal properties of the metals used in the circuit.
P94
A thermocouple circuit generates a measurable, low voltage output that is approximately
the temperature difference between the hot junction and the cold junction.
The science behind piezoelectricity is the interaction between Coulomb forces and the elastic forces in a unit cell when subjected to a:
Where does the piezoelectric effect occur?
a) In materials with more than six valence electrons.
P95
Piezoelectric materials can be divided into how many main groups?
a) 2.
195
What is the best-known piezoelectric material?
Quartz.
195
What type of power generation has no moving parts, quiet operation, and very little deterioration over time?
Piezoelectric.
P96
In a photovoltaic cell the voltage produced is
the amount of light striking the cell.
P910
What law describes the amount of voltage induced when a conductor moves across a magnetic field?
a) Faraday’s.
898
In a generator, if flux is cut at a greater rate, the amount of induced voltage:
(a) Increases.
Pg 9
What type of power production has the widest commercial application?
b) Solar.
19 9
What type of power production has the least commercial application?
a) Chemical.
P910
