[Virginia Tech Department of Physics]

Lecture Demonstrations

Electricity & Magnetism
   

E63: Faraday's Law - Oscilloscope

 

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

Description:

 

Attach channel 1 of the oscilloscope to the primary coil. Attach channel 2 to the secondary coil. Attach the small coil to the oscillator (oscillator frequency below 1 Hz) and point out that the current is oscillating in the small solenoid producing a time dependent field in the solenoid. Then, place the small solenoid in the large solenoid and the students can see that a current is now oscillating in the large solenoid. You can see that the current in the large solenoid is 90o out of phase with the current in the small solenoid. Finally, place the iron rod in the two solenoids to demonstrate the effect of increasing the permeability of the core.

 

Equipment List: Storage Location: CHEMP 130A

 

Tektronix Digital Oscilloscope C1.3
  Primary/Secondary coils with iron core B4.3
  WaveTek FuctionGenerator C1.3
  Power Amplifier C1.3

References:

Manual: None   Setup Notes: E63 PIRA #:
Manufacturer(s): Cenco, WaveTek, VT Other school's Demonstration web pages

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