JAMB Physics 1985 Question 39

Question 39

Current Electricity

Which of the following will convert a milliammeter to a voltmeter?

  1. A.Low series resistance
  2. B.Low parallel resistance
  3. C.High series resistance
  4. D.High parallel resistance
  5. E.Parallel resistance equal to milliammeter resistance.
Show the answer and explanation

Answer: C (High series resistance)

Explanation

A voltmeter must draw very little current, so a high resistance (multiplier) is put in series with the meter.