Two electric lamps of 40 watt each are connected in parallel. The power consumed by the combination will be
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
20 watt
b
60 watt
c
80 watt
d
100 watt
answer is C.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
P1=V2R1 and P2=V2R2When bulbs are connected in parallel, then equivalent resistance R is given by Rp=R1R2R1+R2∴ Pp=V2R1R2R1+R2=V2R1+R2R1R2=V2V2/P1+V2/P2V2/P1×V2/P2=V4P1+P2P1P2V41/P1P2=P1+P2=40+40=80 watt Note. For series combinationPs=V2R1+R2=V2V2/P1+V2/P2=P1P2P1+P2