There are the two electric bulbs of 40 W and 100 W. Which one will glow brighter when first connected in series and then in parallel?
Text Solution
Verified by ExpertsThe correct answer is:
A
Let, each bulbs are rated at V volts, men.
When bulbs are connected in series (same current flow across the bulbs):
Hence, 40 W bulb glow brighter as 
is 2.5 times 
.
When bulbs are connected in parallel (Same voltage across the bulbs)
Hence, 100 W bulb glow brighter as 
is 2.5 times 
.
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