[Virginia Tech Department of Physics]

Lecture Demonstrations

Electricity & Magnetism
   

E87: Jacob's Ladder

 

Purpose: To demonstrate a high voltage, high frequency phenomenon

Description:

 

An arrangement of a pair of horn electrodes attached to a high voltage, high frequency AC supply.

When power is applied, a stationary arc forms at the narrowest point between the electrodes. As the discharge heats the ionized air it rises, carrying the discharge upwards until it is extinguished near the top, to be replaced by a new discharge at the narrowest point. In this newly developed model, the power supply is built into the base, and delivers approximately 12kV at 25kHz.

Equipment List: Storage Location: CHEMP 130A

 

Jacob's ladder B1.5

References:

Manual: None

  Setup Notes: E87 PIRA #:
Manufacturer(s): Sargent-Welch # WL2388 Other school's Demonstration web pages

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