wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

The power dissipated by R=2 Ω resistor is -

A
1 W
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2 W
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
3 W
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
4 W
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 2 W
Let us use the technique of successive reduction. The resistor in arm XQ can be removed, as it represents a balanced Wheatstone bridge.



Now arms PQR and PR are in parallel, their equivalent resistance is given by,
6×36+3=2 Ω

SR can be removed as it represents another balanced Wheatstone bridge and equivalent resistance between PT will be,
6×186+18=92 Ω
Further, net equivalent resistance,

Req=2+92=132 Ω

So, current through R, i=6.513/2=1 A

Power dissipated,

P=i2R=12×2=2 W

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon