The e.m.f. of a cell can be measured approximately by:

  1. a low-resistance voltmeter in a large current
  2. an ammeter in series
  3. a high-resistance voltmeter across it when no current is drawn
  4. measuring its mass
Answer

C) a high-resistance voltmeter across it when no current is drawn

Open-circuit p.d. ≈ e.m.f. SLO P-09-E-15 · Application

Physics MCQ · More Current Electricity MCQs · Practise