Question

A student conducted an experiment to determine the resistance of a lightbulb. while performing the experiment the student noticed that the lightbulb began to glow and became brighter as she increased the voltage. of the factors affecting resistance, which factor caused the greatest change in the resistance of the bulb during her experiment?

im not sure about the answer...is it voltage, temperature, or the resistance?
temperature affected the bulb greatly. i need help with energy

Answer 1

Explanation :

In this experiment, the student noticed that the light bulb began to glow and became brighter as she increased the voltage. The greatest change in the resistance of the bulb is caused due to increasing temperature.

The temperature depends directly on the resistance. It can be shown from the following relation :

`R=R_o[1+\alpha(T-T_o]`

Where

`R_o\ and\ T_o` are resistance and temperature of reference material.

It is clear that when the temperature increases, the resistance also increase. Due to this, the bulb starts getting hotter.

Answer 2

The light bulb began to glow and became brighter as the voltage is increased. This is the effect of Ohm's Law.

Ohm's Law:

V = I*R

where
I = the current of the system
R = resistance of the system
V = voltage of the system

Therefore, the increase in voltage greatly affected the resistance of the system. According to Ohm's Law, voltage is indirectly proportional to resistance. As the voltage is increased, the resistance is decreased.