Question
Will the resistance of a fil ament lamp incre ase, dec rease or stay the same if the tempe rature of its fila ment decr eases? decred se increas e stay the same
Answer
4.1
(271 Votes)
Daniel
Master · Tutor for 5 years
Answer
A
Explanation
The resistance in a filament lamp is directly related to its temperature via the thermal properties of the material, namely tungsten. As its temperature decreases, the movement of the atoms in the conductor decreases, leading to a lower chance of electrons scattering. This has the corresponding effect of decreasing resistance. Therefore, as the temperature of a filament lamp decreases, the resistance will also decrease.