Everyday Science MCQs

Page No. 117

Kilowatt-hour is a unit of____________?


aPower

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bElectric Current

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cEnergy

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dTime

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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.

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bTurning a star from white to blue

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cIn future sun would become blue

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dBlack hole was blue at its start

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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

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b12 days

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c16 days

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d8 days

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View Answer 8 days

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


a2

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b3

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c0

✓


d4

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View Answer 0

Where do most of Asteroids lie?


aIn asteroid belt between the orbits of Mars and Jupiter

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bIn asteroid belt between the orbits of Mars and Venus

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cIn asteroid belt between the orbits of Jupiter and Venus

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dEverywhere in the sky

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Television signals are converted into light signals by___________?


aOptical fiber

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bTransistor

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cDecoder

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dPhoto diode

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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

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bOrbit of moon around earth

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cDirection of rotation of earth around sun

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dArea of the sun covered by the moon

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Which of the following layers make radio transmission possible?


aTroposphere

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bIonosphere

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cMesosphere

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dStratosphere

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View Answer Ionosphere

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


aCarbon

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bGold

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cSilver

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dPlatinum

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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

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bPerihelion

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cPerigee

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dApogee

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View Answer Aphelion

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