Download Lab 1 - mrmaloley

Lab 1-The Resistor and Current Flow
AIM:
To investigate the flow of current in electronic circuits
MATERIALS:
Breadboard
(1) 100 ohm resistor
(1) 220 ohm resistor
Various wires
Power supply
(1) 1000 ohm resistor
(1) Light emitting Diode (LED)
PROCEDURE:
1)
2)
3)
4)
5)
6)
Assemble the circuit as the schematic below shows.
Make an observation of the condition of the LED.
Replace the 100 ohm resistor with a 220 ohm resistor
Make an observation of the condition of the LED.
Replace the 220 ohm resistor with a 1000 ohm resistor
Make an observation of the condition of the LED.
OBSERVATIONS:
Resistor resistance
(Ohms)
100
220
1000
Brightness of LED
DISCUSSION:
1) Describe the change in the brightness of the LED with the change in
resistance.
2) Can you suggest a reason why this occurs?
3) How does this relate to Kirchoff’s voltage law.