True RMS Responding Voltmeter

Electrical Measurements

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “True RMS Responding Voltmeter”.

1. R.M.S value means _________
a) root mean square
b) rate mean second
c) root median second
d) rate mode second

2. Meter reading is obtained by ________
a) sensing voltage
b) sensing heat power
c) sensing current
d) sensing resistance

3. Measurement of heat power ________
a) uses a heat sink
b) uses a thermometer
c) uses a thermocouple
d) uses a black body

4. Sufficient heating of the heater is ensured by ________
a) increasing the temperature
b) making use of induction coil
c) amplifying d.c. input
d) amplifying a.c. input

5. Power in a thermocouple is given by ________
a) Power = E2 rms / Rheater
b) Power = E2 rms
c) Power = Rheater
d) Power = E2 rms × Rheater

6. What is the main disadvantage of a true r.m.s responding voltmeter?
a) presence of transducer
b) presence of thermocouple
c) presence of transformer
d) presence of oscillator

7. What is the naming convention for the two thermocouples?
a) thermocouple 1 and thermocouple 2
b) input thermocouple and output thermocouple
c) measuring thermocouple and balancing thermocouple
d) internal thermocouple and external thermocouple

8. Sensitivity is of the order of ________
a) MV
b) V
c) GV
d) mV

9. Response of thermocouples is fast.
a) True
b) False

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