Q.

There are two electric bulbs of 40 W and 100 W. Which one will be brighter when connected in series and when in parallel?

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away
An Intiative by Sri Chaitanya

a

40 W in series and 100 W in parallel

b

100 W in series and 40 W in parallel

c

40 W both in series and parallel will be uniform

d

100 W both in series and parallel will be uniform

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

R1R2 = P2P1 =  10040 =  52.  Resistance of 4o w bulb is 52 times than 100 W. In series, P=i2R and in parallel, P=V2R So 40 W in series and 100 W in parallel will glow brighter.
Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon