Charge , Fields, Voltage, Current, and Beams
MP3 Lecture
Text Only
Lecture
Main Lecture Points
1. Current flows in the direction of E field. That is it
flows from positive to
negative potential.
2. Current normally flows in the direction of arrows on transistors and
diode symbols.
3. Current in wire and resistors is due solely to electron flow.
4. Current in transistor and diodes is due to hole flow
(positively charged molecules)
5. Positive charged particles flow in the direction of current
and E fields.
6. Negative charged particles flow in opposite direction of
current or E fields.
7. The EMF of a battery forces
positive ions to move to the positive plate of a battery
8.
The EMF of a battery forces negative ions to move to the negative plate of
a battery.
9. Holes (positively charged molecules) in
silicon crystal lattice carry charge in semiconductors and move in direction of
current. Current is in the direction of E field. Current direction is indicated
by direction of arrow on transistor or diode.
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Reading
Assignment (Links) Below:
Read Site
Linker 6
Read "What is
Charge" thru "Batteries"
Read Site
Linker 23
Read
topic current and Charge
Read Site
Linker 77
Electromagnetism
Read Site
Linker 178
Introduction to Time-of-Flight Mass
Spectrometry
