MCQ Subject: Measurements & Instrumentation

Which type of transducer inherently generates its output signal without requiring an external power source, relying instead on the measurand to produce the output voltage or current?

In a Variable Inductor used in measurements, the inductance is typically varied by:

A strain gauge primarily measures mechanical strain by utilizing the change in which electrical property?

A thermometer consistently reads 2°C higher than the actual temperature every time it is used. What type of measurement error does this describe?

In a Wheatstone bridge, to achieve balance, the ratio of resistances in the first pair of arms must equal the ratio in the second pair. Which of the following best describes the balanced condition?

What is the primary advantage of using a potentiometer for DC voltage measurement compared to a conventional voltmeter?

In a Wheatstone Bridge circuit, balance is achieved when the ratio of the resistances in the two arms is equal. Which statement about the balanced condition is TRUE?

A thermocouple generates a voltage due to a temperature difference between its two junctions. This phenomenon is based on which effect?

Which of the following instruments operates based on the principle that a voltage is generated between two dissimilar metals when one junction is heated or cooled relative to the other?

For accurate current measurement in a circuit with a resistor (R) and a capacitor (C) in series, where should an ammeter (A) be placed?