A potentiometer is better than a voltmeter for measuring e.m.f. because a voltmeter:

  1. has infinite resistance
  2. is more accurate always
  3. measures current
  4. draws some current, so it reads the terminal p.d.
Answer

D) draws some current, so it reads the terminal p.d.

Potentiometer is a null method. SLO P-09-E-23 · Application

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