Q. It is possible that any some constant value of emf, but the potential difference between the plates is zero?
A) Not, possible
B) Yes, if another identical battery is joined in series
C) Yes, if another identical battery is joined in opposition
D) Yes, possible, if another similar battery is joined in parallel
Explanation
(c) If an identical battery is connected in opposition, net emf $= E - E = 0\ $and the current through circuit will be zero, although each one of them has constant emf.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.