[Virginia Tech Department of Physics]

Lecture Demonstrations

Electricity & Magnetism
   

E64: Faraday's Law - Coils

 

Purpose: To demonstrate that a time-dependent B field through a coil induces a current in the coil.

Description:

 

     A large 200-turn field coil hooks up to the power amplifier into Analog C creating a magnetic field. Hook the positive terminal of the power amp to the far left terminal of the field coil and the negative terminal of the power amp the the black terminal on the far right of the field coil. Plug the voltage probe into Analog A. For each detector coil wand plug the red lead of the voltage sensor into the left terminal and the black into the right if you're reading the text on the wand. Now open the file "E64.ds" from the location S:\Demonstration files\Electricity & Magnetism. Data studio will open, and the computer will now read different types of graphs with the field coil serving as a function generator. You can read the induced voltage versus time by holding the differend coil wands in the center of the field coil oriented in the same way as the large coil. Rotate the wand around and see the affect on said graphs.

                                

Equipment List: Storage Location: CHEMP 130A

 

Pasco 750 Interface Lecture 1
  Helmholtz Coil B4.3
  Pick-up coils B4.3
  Voltage probe for Pasco 750 Interface C.H
  Power Amplifier I2.2

References:

Manual: None   Setup Notes: E64 PIRA #:
Manufacturer(s): Pasco Other school's Demonstration web pages

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