Heated horizontal nichrome wire stretches, weight sags.

Heated horizontal nichrome wire stretches, weight sags. A weight hangs in the middle of a horizontally stretched Nichrome wire. A transformer limits the amount of current that flows through the wire. The wire expands and lengthens as it heats up, and the weight on the wire visibly lowers. The wire is heated to glowing (48 volts A.C. at 5 Amps). This takes about 10 seconds. TEMPERATURE AND EXPANSION.