Everyday Science MCQs

Page No. 117

Kilowatt-hour is a unit of____________?


aPower


bElectric Current


cEnergy


dTime


View Answer Energy

The term ‘Blue Shift’ is used to indicate?


aDoppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.


bTurning a star from white to blue


cIn future sun would become blue


dBlack hole was blue at its start



The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?


a4 days


b12 days


c16 days


d8 days


View Answer 8 days

The number of spark plugs needed in a diesel engine is__________?


a2


b3


c0


d4


View Answer 0

Where do most of Asteroids lie?


aIn asteroid belt between the orbits of Mars and Jupiter


bIn asteroid belt between the orbits of Mars and Venus


cIn asteroid belt between the orbits of Jupiter and Venus


dEverywhere in the sky



Television signals are converted into light signals by___________?


aOptical fiber


bTransistor


cDecoder


dPhoto diode


View Answer Photo diode

Which of the following explains the reason why there is no total eclipse of the sun?


aSize of the earth in relation to that of moon


bOrbit of moon around earth


cDirection of rotation of earth around sun


dArea of the sun covered by the moon



Which of the following layers make radio transmission possible?


aTroposphere


bIonosphere


cMesosphere


dStratosphere


View Answer Ionosphere

Diamond is a very expensive ornament. It is composed of a single element ___________?


aCarbon


bGold


cSilver


dPlatinum


View Answer Carbon

The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called ___________?


aAphelion


bPerihelion


cPerigee


dApogee


View Answer Aphelion

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