Electrical Engineering MCQs

Page No. 86

______________ multivibrator is a square wave oscillator?


aMonostable


bAstable


cBistable


d None of the above


View Answer Astable

When a transistor is driven to saturation, ideally the output is _____________?


aVCC


b0


cVCC/2


d2VCC


View Answer 0

The most inexpensive switch is _____________ switch?


aElectronic


bMechanical


cElectromechanical


dNone of the above


View Answer Electronic

A switch has ______________?


aOne state


bTwo states


cThree states


dNone of the above


View Answer Two states

The maximum speed of electronic switch can be _____________operations per second?


a 104


b10


c1000


d109


View Answer 109

The main disadvantage of a mechanical switch is that it_______________?


aIs operated mechanically


b Is costly


cHas high inertia


dNone of the above


View Answer Has high inertia

The switch that has the fastest speed of operation is ____________ switch?


aElectronic


bMechanical


cElectromechanical


dNone of the above


View Answer electronic

A relay is ___________switch?


a A mechanical


bAn electronic


cAn electromechanical


dNone of the above


View Answer An electromechanical

A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage ?


a8 V


b 7 V


c6 V


d2 V


View Answer 8 V

In a regulated power supply, two similar 15 V zeners are connected in series. The input voltage is 45 V d.c. If each Zener has a maximum current rating of 300 mA, what should be the value of the series resistance ?


a10 O


b50 O


c25 O


d 40 O


View Answer 50 O

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