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Current Electricity — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity2 Marks
Question
State the advantages of potentiometer over voltmeter.
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Answer

Advantages of potentiometer over voltmeter:
  1. The voltmeter is used to measure the terminal P.D. of the cell while the potentiometer is used to measure the small terminal P.D. as well as the e.m.f of the cell.
  2. The accuracy of the potentiometer can be easily increased by increasing the length of the wire.
  3. A small P.D. can be measured accurately with the help of a potentiometer. The resistance of the voltmeter is high but not infinite to work as an ideal voltmeter.
  4. The internal resistance of a cell can be measured with the help of a potentiometer.
  5. The potential difference across the wire is greater than $E_1$ or $E_2$ or $E_1 + E_2.$

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