Question

If two cells are connected in series opposition in an electrical circuit, when does current flow? Assume only conductors are present.

• A. Magnitude of emf of cells is same
• B. Size of cells is different
• C. Magnitude of emf of cells is different
• D. Always works irrespective of nature of cells

Answer 1

The correct option is C Magnitude of emf of cells is different

For current to flow, a potential difference must exist. When two cells are connected in opposition, potential difference exists only when magnitude of EMFs of cells are different.hence option C is correct.