When a cell is balanced on a potentiometer, the e.m.f. measured is not affected by its internal resistance because:

  1. the galvanometer cancels it
  2. the wire has no resistance
  3. the driver cell supplies extra p.d.
  4. no current flows through the cell
Answer

D) no current flows through the cell

No lost volts at balance. SLO P-09-E-23 · Application

Physics MCQ · More Current Electricity MCQs · Practise