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

The effective resistance between points P and Q of the electrical circuit shown in figure is


A
2Rr(R+r)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
8R(R+r)(3R+r)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
2r + 4R
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
5R2+2r
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 2Rr(R+r)



The branches ABPQ and PQCD are a balanced Wheatstone's bridge. Therefore resistances between E and E and between F and G do not contribute and the circuit simplies to the one show in figure. The effective resistance Re between P and Q is given by
1Re=14R+12r+14R
which gives Re=2Rr(R+r)


flag
Suggest Corrections
thumbs-up
3
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Series and Parallel Combination of Resistors
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon