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= Electrophorus, 5A10.20 =

'''Location:'''
 * '''Cabinet:''' Electricity and Magnetism Right
 * '''Bay:''' (A2)
 * '''Shelf:''' #1

{{attachment:Electrophorus_5A1020.jpg}}

'''Description:'''

Invented in 1764 by Johan Wilcke and was improved by Alessandro Volta 11 years later, the Electrophorus or Capacitive Generator produces an electrostatic charge from a process call induction. The Electrophorus is also called a "charge-bearer" and the electrical potential of an Electrophorus can be as high as 30 kV.

||<:style="width: 60%" :40%>'''Equipment'''||<:30%>'''Location'''||<:25%>'''ID Number'''||
|| || || ||
||Electrophorus (Small)||[[EMCabinetRtBayA2| EM Cabinet A2 Shelf 1]]||5A10.20.a ||
||Electrophorus (Large)||[[EMCabinetRtBayA2| EM Cabinet A2 Shelf 1]]||5A10.20.b ||
||Rabbit Fur||[[EMCabinetRtBayA1| EM Cabinet A1 Shelf 1]]|| ||

'''Setup:''' 
 1. There is no setup procedure

'''Cautions, Warnings, or Safety Concerns:'''
 1. Our large Electrophorus can deliver a potential as high as 30 kV and can be an unpleasant shock but not too harmful.

'''Demonstration:''' 

Small Electrophorus: 
 1. Place flat acrylic plate on grounded conducting plane (not shown).??(Check)
 * Rub the acrylic plate with the rabbit fur. This will negatively charge the acrylic plate.
 * Place Electrophorus on plate
 * Momentarily ground top surface of electrophorus to the same grounding plate that the acrylic plate is on.??(Check)
 * Lift the electrophorus off the acrylic plate.
 * Bring your finger to close to the electrophorus and a spark will jump. 
 * To repeat, start at step 3. 
Large Electrophorus:
 1. Rub the glass plate with the rabbit fur. This will negatively charge the acrylic plate.
 * Place Electrophorus on plate
 * Momentarily ground top surface of electrophorus using the pice of alummum foil coming from the grounding plate benieth the electrophorus.
 * Lift the electrophorus off the glass plate.
 * Bring your finger to close to the electrophorus and a large spark will jump. 
 * To repeat, start at step 2. 
 
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'''References:'''

 1. [[http://www.ece.rochester.edu/~jones/demos/electrophorus.html|Jones, Thomas B. (July 2007). "Electrophorus and accessories". Univ. of Rochester.]]
 2.  [[http://en.wikipedia.org/wiki/Electrophorus|Wikipedia]]


[[Electrostatics]]

[[Demonstrations]]

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