Technical data Power consumption of a light bulb with Cobra SMARTsenseArticle no: P1379269 ![]()
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Principle The incandescent lamp is a classic example of a non-ohmic conductor. Due to the stronger oscillation of the lattice atoms at higher temperatures, the resistance of the incandescent lamp increases with increasing current. This is reflected in the non-linear curve of the current-voltage characteristic. Benefits
Tasks The incandescent lamp is connected in series with an ammeter. A voltmeter is used to simultaneously measure the voltage drop across the incandescent lamp. The students measure the current-voltage characteristic of an incandescent lamp. Learning Objectives The students should recognize that the current-voltage characteristic of an incandescent lamp is non-linear and that incandescent lamps are therefore non-resistive conductors.
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