MCQ Subject: Measurements & Instrumentation

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?

What is the primary function of a Current Transformer (CT) in electrical measurement systems?

Which type of error in measurement systems refers to the deviation of the measured value from the true value due to instrument limitations?

What is the primary function of a ‘Wattmeter’ in electrical measurements?

A thermocouple is classified as which type of transducer because it does NOT require an external power source for operation?

In transformers, the primary and secondary coils are coupled primarily through which phenomenon?

In measurements involving rotors at rest, which balancing technique is most appropriately applied to ensure precision?

In a three-phase power system, which of the following instruments directly measures the power by sensing the voltage and current in the same phase, using a power factor correction internally?

Which of the following standards specifically addresses the evaluation and expression of measurement uncertainty in electrical measurements?