# Question on bulb and brightness

EDIT: NOT A HOMEWORK PROBLEM

in a bulb increase in resistance means that there is a increase in brightness.

if there is a decrease in resistance means that decrease in brightness.

is the statement correct ?

one more question does the brightness depend on current
say we have same R , if i increase the current does the brightness change?

say you have the same resistance if you increase the current does the brightness change?

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russ_watters
Mentor
Not sure if this is homework so a small hint:

Voltage is constant, right? Keep that in mind and examine the two equations that relate voltage, amperage, wattage and resistance.

that helps but this is not a home work question this is something that bothered me as i was reading the text book

so i think since resistance increases the thermal energy as the resistance increase the thermal energy increases so as thermal energy increases the brightness increase.

but not sure if the current affects it..?

K^2