CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Out of the following bulbs rated 40W, 220V ,60W, 220V and 100W, 220V which one will glow the brightest when connected in series to a supply of 220V ?

Open in App
Solution

P = E²/R
100 = 220²/R1
R1 = 484 ohms (100)
R2 = 807 ohms (60)
R3 = 1210 ohms (40)

All 3 in series, R = 2501 ohms
I = 220/R = 0.0880 amps
P = 19 watts

P1 (100) = 0.0880²*484 = 3.75 watts
P2 (60) = 0.0880²*807 = 6.25 watts
P3 (40) = 0.0880²*1210 = 9.37 watts
So 40w bulb will glow brightest

flag
Suggest Corrections
thumbs-up
14
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electric Power
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon