wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

n identical cells are joined in series with two cells A and B with reversed polarities. Emf of each cell is E and the internal resistance is r. Potential difference across cell A and B is :(n>4)

A
2En
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2E(11n)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
4En
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
2E(12n)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 2E(12n)
Net EMF = (n2)E2E
=(n4)E
I=(n4)Enr
Potential difference across A and B = E+Ir
=E+(n4)Enr×r
=E[1+(n4n)]
=E[n+n4n]
=2E[n2n]
=2E[12n]

980496_1076390_ans_f949f25839d64349b76398301825f07f.PNG

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Combination of Resistances
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon