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NDA 1 2025 GAT, question 146

Topic: Physics

Q146

Which one of the following statements is NOT correct ?

  1. (a) An ammeter is always connected in series in the circuit to measure the current
  2. (b) A Voltmeter is always connected to parallel in a circuit to measure the voltage
  3. (c) A voltmeter has a high resistance and an ammeter has a low resistance
  4. (d) A voltmeter has a low resistance and an ammeter has a high resistanceCorrect answer

Solution.

Answer: (d) A voltmeter has a low resistance and an ammeter has a high resistance

  1. An ammeter goes in series and should have very low resistance so that it changes the current as little as possible.
  2. A voltmeter goes in parallel and should have very high resistance so that it draws very little current.
  3. Option (d) reverses these requirements.