Sources and Detectors

Electrical Measurements

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Sources and Detectors”.

1. At very low frequencies in a AC bridge, the source is _________
a) power line
b) e.m.f
c) galvanometer
d) tuned circuit

2. At high frequencies in an AC bridge, the source is _______
a) tuned amplifiers
b) oscillators
c) vibration galvanometer
d) high voltage source

3. The frequency range of a typical oscillator is _______
a) 1 Hz to 50 Hz
b) 1 kHz to 100 KHz
c) 40 Hz to 125 kHz
d) 1 MHz to 150 MHz

4. The power output for a typical oscillator is _______
a) 1 kW
b) 1 MW
c) 1 mW
d) 7 W

5. The output waveform in an oscillator is _______
a) sinusoidal
b) cosinusoidal
c) tangential
d) logarithmic

6. The output frequency of an oscillator is _______
a) unstable and fixed
b) stable and adjustable
c) stable and fixed
d) unstable and variable

7. The output power of an oscillator is not enough to drive power circuits.
a) True
b) False

8. Tuned amplifiers can be set to _______
a) low frequencies
b) high frequencies
c) any frequency
d) audio frequencies

9. Tuned amplifier circuits respond to broad bandwidth at bridge frequency.
a) True
b) False

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