How Does Bulb Brightness Vary in Parallel and Series Circuits?

AI Thread Summary
In a parallel circuit, both lightbulbs receive the full voltage, so the 40 W bulb will be brighter than the 30 W bulb. In a series circuit, the voltage is divided between the bulbs, leading to reduced brightness for both; the 40 W bulb will still be brighter than the 30 W bulb, but both will be dimmer than in parallel. Therefore, the order of brightness is the 40 W bulb in parallel, followed by the 30 W bulb in parallel, then the 40 W bulb in series, and finally the 30 W bulb in series. The key takeaway is that bulbs in parallel are brighter than those in series due to the voltage distribution. Understanding these principles is essential for predicting bulb brightness in different circuit configurations.
fuschiso
Messages
2
Reaction score
0
I just have a quick question, and if anyone could help, I would really appreciate it.

Two lightbulbs, one rated 30 W at 120 V and one rated 40 W at 120 V, are arranged in two different circuits (parallel and series). The power source of both circuits is 120 V.

What would the order of the bulbs be, in order of their brightness? That is, the 30 W bulb in parallel, the 40 W bulb in parallel, the 30 W bulb in series, and the 40 W bulb in series?

Thanks!
 
Physics news on Phys.org
The bulb that transforms the most Power will be the brightest.
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »

Similar threads

Differences in the Brightness of bulbs for 2 separate circuits
Replies
1
Views
2K
Which bulb will glow brighter in a series and parallel circuit?
Replies
5
Views
2K
How to determine if electrical components are connected in parallel or in series?
Replies
10
Views
891
Current, voltage : brightness of bulb in parallel or series
Replies
2
Views
4K
Brightness of bulbs in series and parallel
Replies
14
Views
11K
Current and resistance in series and parallel circuits
Replies
3
Views
1K
Parallel and Series circuits and current
Replies
3
Views
1K
3 bulbs at different brightness
Replies
4
Views
2K
Brightness of bulbs depending on their watt level
Replies
11
Views
2K
Why Is the 40 W Bulb Brighter When Connected in Series with a 60 W Bulb?
Replies
4
Views
6K

Hot Threads

Recent Insights

Back
Top