Info Flashcards
(30 cards)
Examples of semiconductors
Silicon and Germanium
Examples of conductors
Copper, Aluminium and Carbon
Examples of Insulators
Mica and Porcelain
Unit of charge
Coulomb
Formula for current density
Current/cross sectional area
J=I/A
Temperature cables cannot be heated over
60 Celsius
Charge of Anode and Cathode
Anode = positive Cathode = negative
Charge of Anion and Cathion
Anion = negative Cathion = positive
Formula for current
Current = Charge / time
I = Q/t
Formula for conductance
Conductance = 1/Resistance
G = 1/R
Conventional flow
Positive to negative
Electron flow
Negative to positive
What is a photocell an example of?
An optoelectronic component
What type of material can hold static charge?
Insulator
What does source voltage depend on
The materials in the power source
Type and concentration of electrolyte
What 3 factors effect the voltage induced by the generator principle
Magnetic field strength
Speed of movement
Effective length of conductor
What is the unit of capacity
Ampere Hours (Ah)
What is the voltage of a lead acid cell when charged
2V
What is the final discharge voltage of a Lead acid cell?
1.83V
What is the positive plate in a Lead acid cell made of?
Lead peroxide
What is the negative plate in a Lead acid cell made of?
Spongy Lead
What is the electrolyte in a Lead acid cell made up of and in what percentages?
30% sulphuric acid
70% water
What is the voltage of a Nickel cadmium cell when charged?
1.2V
What is the final discharge voltage of a
Nickel cadmium cell?
1V
