Contents
Cal Poly Pomona
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Physics Demonstrations at Cal Poly Pomona

Demo Index:
    EM-D-DM
Pira Index:
    5D 20.00
Title:
    DRUDE MODEL OF CONDUCTION
Description:
    Ball bearings rolling down a bed of nails simulates the resistance of a conductor.
Equipment:
    1. Bed of nails
    2. Large cart
    3. Box of ball bearings (1 cm diameter)
    4. Box of paper to use for ramping.
Procedure:
    1. Set up as shown below.
    2. Pour ball bearings down from the top of the board, noting how long it takes for the balls to reach the bottom.
    3. Repeat, this time shaking the board side to side to simulate thermal activity. Note the rate of the balls now.