LRC Resonance

5L20.20B | parts
Catalog: 
5L20.20B
Location: 
parts
Room: 
PS F175
Quantity: 
1
Setup Time: 
30 min
Instructors: 
Adams
  • The coils close together show a large signal on the oscilloscope. The current in
    The coils close together show a large signal on the oscilloscope. The current in the source is in phase with current across the resistor. The voltage in the resistor
  • The coils far apart show a small signal on the oscilloscope.
    The coils far apart show a small signal on the oscilloscope.
  • This is the circuit diagram. The connections for the scope are moved during the
    This is the circuit diagram. The connections for the scope are moved during the demo. The wires should be color coded so that the correct polarity is displayed after the switch.
  • The receiving coil is disconnected to see the raw signal.
    The receiving coil is disconnected to see the raw signal.
  • The circuit for the transmitting coil.
    The circuit for the transmitting coil.
  • The circuit for the receiving coil.
    The circuit for the receiving coil.
  • The external trigger was needed to keep the trace from drifting. For this camera
    The external trigger was needed to keep the trace from drifting. For this camera set up the camera needs to be mounted upside down since it reflects in two mirrors.
Description: 

Two circuits are set up, both LRC. First with a variable capacitor and fixed inductor. Second with a fixed capacitor and a coil and movable iron core.

Purpose: 
The effect of variable C and variable L is shown.
Parts: 


oscilloscope (14-1)
2 decade resistor boxes
2 decade capacitor boxes
2 8.2 mH coils
2 demo tables
function generator (Dh2)
12 patch cables