Resistor Problem involving Lightbulbs

  • Thread starter Thread starter ryankunzzz
  • Start date Start date
  • Tags Tags
    Resistor
AI Thread Summary
The discussion centers on determining the brightness of six identical lightbulbs connected to a battery. The initial assumption was that bulbs 6, 1, and 2 are the brightest due to equal current flow, while bulb 3 is brighter than bulbs 4 and 5, which are equal. However, the correct understanding is that brightness correlates with power, expressed as P=R×I². The final ranking of brightness is bulbs 6, 1, and 2 being the brightest, followed by bulb 3, and then bulbs 4 and 5 being the dimmest. This clarification helps in accurately assessing the brightness of each bulb.
ryankunzzz
Messages
21
Reaction score
0

Homework Statement


We have 6 lightbulbs that are identical attached to a battery, and we need to list them from brightest to dimmest.

This is what they look like.
2mgsN9o.png


Homework Equations



None...?

The Attempt at a Solution



So, my thinking is that bulbs 6,1,2 are the brightest and the same, because the same amount of current is flowing through them, then I think that 3 is brighter than 4 and 5 which are equal...

This is wrong and I don't know why.
 
Physics news on Phys.org
I agree with your answer. Why do you think it would be wrong?
 
I don't know. As long as someone agrees with this, I'll talk to my teacher.
 
ryankunzzz said:
I don't know. As long as someone agrees with this, I'll talk to my teacher.
Yes, you are correct.
 
Hello my friend
Your answer is correct. Brightness of bulbs is proportional power of them.
P=R×I×I
Therefore brightness of bulbs:
6,1,2(are same)>3>4,5(are same)
 
Thread 'Struggling to make relation between elastic force and height'

Thread 'Struggling to make relation between elastic force and height'

Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »

Similar threads

Determining the Change in Bulb Brightness by Changing Circuit
Replies
6
Views
1K
Is Bulb A Brighter in a Parallel Circuit Due to Potential Difference?
Replies
4
Views
2K
Resistors (lightbulbs) Power & Brightness
Replies
13
Views
3K
Why do the headlights on the car become dim when the car is starting?
Replies
4
Views
2K
Analyzing Bridge Circuit w/ Loop Currents
Replies
6
Views
1K
Question on lightbulb brightness in circuit analysis
Replies
2
Views
2K
A circuit involving two non-linear resistances (incandescent lamps)
Replies
14
Views
2K
Desperately need introductory CIRCUIT/RESISTOR help
Replies
7
Views
1K
Lightbulbs and a battery circuit
Replies
12
Views
2K
Help with determining brightness of light bulbs in a circuit
Replies
2
Views
5K

Hot Threads

Recent Insights

Back
Top