NDA General Ability Question (2025) — Solution

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