NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Science
NDA 2025 · General Ability · General Science
Which one of the following statements is NOT correct?
Which one of the following statements is NOT correct?
Options
- AAn ammeter is always connected in series in the circuit to measure the current
- BA Voltmeter is always connected to parallel in a circuit to measure the voltage
- CA voltmeter has a high resistance and an ammeter has a low resistance
- DA voltmeter has a low resistance and an ammeter has a high resistance
Correct answer
D. A voltmeter has a low resistance and an ammeter has a high resistance
Step-by-step solution
An ammeter is used to measure current and is connected in series in a circuit. To ensure it does not significantly alter the current it is measuring, it must have a very low resistance.
A voltmeter is used to measure potential difference and is connected in parallel across the component. To ensure it draws negligible current from the circuit, it must have a very high resistance.
Therefore, the statement that a voltmeter has a low resistance and an ammeter has a high resistance is incorrect.
Answer: A voltmeter has a low resistance and an ammeter has a high resistance
A voltmeter is used to measure potential difference and is connected in parallel across the component. To ensure it draws negligible current from the circuit, it must have a very high resistance.
Therefore, the statement that a voltmeter has a low resistance and an ammeter has a high resistance is incorrect.
Answer: A voltmeter has a low resistance and an ammeter has a high resistance