An engineer compares two voltmeters. If Voltmeter A has higher sensitivity than Voltmeter B, what is the most likely practical implication?
Voltmeter A can detect smaller voltage changes than Voltmeter B.
Voltmeter sensitivity is usually expressed in ohms per volt: \(S = \frac{1}{I_{fs}}\), where \(I_{fs}\) is the full-scale deflection current of the movement.
A higher sensitivity means a smaller current produces full-scale deflection, so the meter responds to smaller signals and can register smaller voltage changes. Its higher resistance per volt also draws less current from the circuit (less loading).
Noise immunity depends on shielding and filtering, not on sensitivity; a more sensitive meter may even pick up more noise.
The maximum voltage measured is set by the range (multiplier resistor), not by sensitivity.
Accuracy depends on calibration and errors, so a more sensitive meter is not automatically more accurate in all measurements.
Hence, the answer is Voltmeter A can detect smaller voltage changes than Voltmeter B.
Similar Questions
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Important Questions from Indicating Instruments
Hot wire ammeters are used for measuring
Which one of the following force is not needed for the satisfactory operation of any indicating (or measuring) instrument?
Assertion (A): Shunt of an ammeter has a low resistance
Reason (R): Shunt may be connected in series or in parallel with an ammeter.Which of the following statements are correct?
A. Ultrasonic method for liquid level measurement is not preferred in industrial applications.
B. In a pH meter, the glass electrode is the reference electrode.
C. A chromatograph is used for analyzing the composition of a gas.
D. The production of Korotkoff sounds in indirect blood pressure measurement is due to pressure pulses produced due to the difference in systolic and diastolic blood pressure.
Choose the correct answer from the options given below:
- Which instrument is representing an integrating type instrument?
