This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Oscilloscope”.
1. CRO stands for __________
a) Cathode Ray Oscilloscope
b) Current Resistance Oscillator
c) Central Resistance Oscillator
d) Capacitance Resistance Oscilloscope
Explanation: Cathode Ray Oscilloscope (C.R.O) is basically used for the measurement of the amplitude of periodic and non periodic signals as a function of time.
2. C.R.O gives __________
a) actual representation
b) visual representation
c) approximate representation
d) incorrect representation
Explanation: Cathode Ray Oscilloscope is used as universal laboratory equipment. It provides a visual representation of time varying signals. It is an important equipment in the development of electronic circuits.
3. Oscilloscope is __________
a) a ohmmeter
b) an ammeter
c) a voltmeter
d) a multimeter
Explanation: Oscilloscope is basically a voltmeter. It employs the movement of an electronic gun assembly with respect to a fluorescent screen. The screen produces the movement of the visible spot.
4. Electron beam is deflected in __________
a) 1 direction
b) 4 directions
c) 3 directions
d) 2 directions
Explanation: The electron beam in an oscilloscope can be deflected in two directions, namely the horizontal (x-direction) and the vertical (y-direction). Two dimensional displays are produced as a result.
5. CRO is a __________
a) fast x-y plotter
b) slow x-y plotter
c) medium x-y plotter
d) not a plotter
Explanation: CRO is basically a fast x-y plotter. The x and y axes can be used to understand the variation in the magnitude of one voltage with respect to another voltage signal.
6. CRO can’t display microseconds time.
Explanation: CRO is a fast x-y plotter and displays periodic signals with time periods of the order of a few microseconds and even nanoseconds.
7. CRT is the heart of CRO.
Explanation: CRT stands for Cathode Ray Tube. It generates electron beam, accelerates and deflects the beam. It thus forms the heart of the CRO.
8. Typically oscilloscope represents __________
a) current and time
b) resistance and time
c) voltage and time
d) power and time
Explanation: In an oscilloscope typically the horizontal or x-axis represents the time while the vertical or y-axis represents the variation in the magnitude of the input signal.
Sanfoundry Global Education & Learning Series – Electrical Measurements.
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