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Current Affairs January 2024

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4

The end product in the uranium disintegration series is

A. lead

B. zinc

C. carbon

D. tin

Correct Answer :

A. lead


Related Questions

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4

The mirage is a phenomenon

A. generally considered as a desert happening

B. caused by unequal heating of the several layers of the atmosphere above the desert

C. in which the refracted rays take a curved path resulting in total internal refection

D. All the above

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Like magnetic poles

A. attract each other

B. repel each other

C. neither attract nor repel

D. attract or repel depending upon the conditions

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The sun continuously produces an enormous amount of energy. This la due to

A. nuclear fission

B. nuclear fusion

C. chemical combustion

D. boiling

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Isotones are species of atoms containing

A. same number of protons but different number of neutrons

B. same number of neutrons but different number of protons

C. the same total number of protons and neutrons

D. same number of protons and different number of electrons

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4

Sound travels fastest in

A. air

B. water

C. iron

D. vacuum

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Nuclear fusion is a process in which

A. the atoms and molecules lose their identity

B. nucleus is split into fragments

C. the nuclear reaction between two light atomic nuclei results in the formation of a heavier nucleus with release of a large quantity of nuclear energy in the process

D. absorption of neutron by a nucleus

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4

The planet that spins Caster than any other planet is

A. Saturn

B. Jupiter

C. Earth

D. Mercury

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4

Out of the following, name the fluorescent substance.

A. quinine sulphate solution

B. paraffin oil

C. fluorescein solutions

D. All the above

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4

A pressure gauge for fluids is called

A. a hydrometer

B. a manometer

C. a lactometer

D. an anemometer

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4

The star nearest to the sun is

A. Proxima Centauri

B. Sirius

C. Aldebaran

D. Vega

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Heat transfer

A. cools the body that transfers it

B. heats the body that absorbs the heat

C. may change the physical state of the substance

D. All the above

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4

The filament used in the electric lamp is made of

A. nichrome

B. tungsten

C. copper

D. aluminium

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4

SONAR (Sound Navigation Ranging) is

A. used by warships and military aircraft to locate enemy submarines

B. used by ships to determine the depth of water beneath them

C. a detective device that uses sound to locate under - water objects

D. All the above

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4

Under similar conditions of temperature and pressure, the velocity of sound is maximum in

A. helium

B. argon

C. hydrogen

D. oxygen

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4

The image of an object formed on the retina of the eye is

A. virtual and upright

B. virtual and inverted

C. real and inverted

D. real and upright

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A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

A. the ball will travel towards the centre of the circle and fall down

B. it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

C. it will fall down at the same place where the string breaks

D. None of these

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4

For viewing objects placed at a higher level from a position at a lower level, the instrument used' Is known aa

A. telescope

B. spectrometer

C. microscope

D. periscope

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4

The difference between planets and stars is

A. planets do not have light of their own whereas stars shine by their own light

B. planets do not twinkle like stars

C. planets are much smaller than stars

D. All the above

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4

The radiator in a car serves to

A. cool the engine

B. heat up the engine

C. start the car

D. moderate the speed

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4

In an oil lamp, holes are provided below the chimney so that

A. necessary oxygen for burning of oil may be provided

B. the convection current of air may be maintained to keep the lamp burning

C. the brightness of the lamp may be increased

D. All the above

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4

The base of an electric iron is brightly polished mainly

A. to make it smooth and frictionless

B. to make it rust - proof

C. to reduce heat loss by radiation

D. to make it more durable

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4

Of the following which has got the highest frequency?

A. ultraviolet rays

B. gamma rays

C. radio waves

D. infrared waves

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4

Which part of the eye photographic camera?

A. Lens

B. Iris

C. Retina

D. Eyelid

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4

When the velocity of a body is halved

A. its momentum is halved

B. its kinetic energy is halved

C. its acceleration is halved

D. its potential energy is halved

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4

Tea pots are highly polished

A. so that they may reflect thermal radiation from outside and minimise such radiation from them

B. so that they may absorb all radiation from outside

C. to make them attractive to look at

D. because they take high polish

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4

X-rays are

A. deflected by electric field

B. deflected by magnetic field

C. slightly deflected by electric field and magnetic field

D. not deflected by electric and magnetic fields

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4

For accurate scientific work, temperatures are often measured by

A. mercury thermometers

B. alcohol thermometers

C. platinum resistance thermometers

D. thermoelectric thermometers

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4

If a body weight 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?

A. 12N

B. 2N

C. 10N

D. 6N

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4

Lightning is produced when

A. similar charges of electricity rush towards each other and then get repelled

B. clouds strike against impurities in air and the friction burns up these impurities

C. strong opposite charges in different clouds break down the resistance offered by the intervening air

D. water vapour produces electricity in the clouds

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4

A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance

A. will increase

B. will decrease

C. does not change

D. varies with the increase of depth of the immersion of the iron piece