Transcript Hall effect

Hall Effect
Form 6
Physics
PowerPoint
Presentation
Chung Sai Chak
Introduction
•
•
target audience: form 6 student in band 5
school, weak in understanding of the
abstract concepts.
After introduced what is the Hall effect,
use the powerpoint slices to give a
lecturing of mechanism of the Hall effect.
When electrons flow without
magnetic field...
t
semiconductor slice
_
+
d
I
I
When the magnetic field is turned
on ...
I
qBv
B-field
As time goes by...
high
potential
qE
I
qBv = qE
low
potential
Finally...
VH
I
B-field
How to calculate
the Hall voltage?
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BI
VH 
nqt
Do you know...
• What is the Hall effect?
• Why we use semiconductor slice to
demonstrate the Hall effect?
• What is the application of the Hall effect?
Thank You