Introduction to AC Bridges

Electrical Measurements

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Introduction to AC Bridges”.

1. In the simplest form, an AC bridge consists of ____________
a) arms, source and a detector
b) arms and source
c) source and detector
d) arms and detector

2. Source is ________
a) dc supply
b) ac supply
c) mixed mode supply
d) high voltage supply

3. At high frequency, source consists of ________
a) amplifiers
b) regulators
c) oscillators
d) op amps

4. Commonly used balance detectors for AC bridges are headphones, tuned amplifiers and vibration galvanometers.
a) True
b) False

5. What is the frequency range for a headphone as a detector?
a) 20 Hz to 20 kHz
b) 10 kHz to 1 MHz
c) 10 MHz to 1 GHz
d) 250 Hz to 4 kHz

6. For single frequency value, the most sensitive detector is ________
a) tuned detector
b) vibration galvanometer
c) headphone
d) oscillator

7. Tuned detectors are used in the frequency range of ________
a) 1 Hz to 100 Hz
b) 10 Hz to 100 Hz
c) 1 kHz to 100 kHz
d) 1 MHz to 100 MHz

8. Vibration galvanometers are used for ________
a) very high frequency
b) very low frequency
c) low audio frequency
d) high audio frequency

9. AC bridge is an outcome of ________
a) Kelvin bridge
b) Megger
c) De Sauty bridge
d) Wheatstone bridge

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