PURPOSE: To determine how resistance varies as a function of diameter and length for the same material.
DESCRIPTION: The resistance of two wires of the same length but different diameter can be compared. The resistance as a function of length can be determined by sliding the clips along the wire. Use of high-resistance nichrome wire keeps stray resistance (in contacts, etc.) small compared with the resistance being measured.
REFERENCES: (PIRA 5D10.20)
EQUIPMENT: Digital meter, nichrome wires of 0.0125" and 0.0250" diameter with clip leads and projection mount.
SETUP TIME: 5 min.
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