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Current Affairs January 2024

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4

The instrument used to measure atmospheric pressure is

A. Pyrometer

B. Eudiometer

C. Barometer

D. Hydrometer

Correct Answer :

C. Barometer


Related Questions

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The power of a lens is

A. equal to its focal length

B. equal to its radius of curvature

C. equal to the reciprocal of its focal length (in metres)

D. equal to twice its focal length

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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

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4

Mica is used in an electric iron because it is a

A. good conductor of heat

B. good conductor of electricity

C. bad conductor of electricity

D. Both (a) and (b) above

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4

The distance between two bodies is halved. Now the force of attraction between them will be

A. half

B. one fourth

C. four times

D. two times

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The velocity of sound in air

A. increases as the square root of the absolute temperature

B. decreases with temperature

C. is independent of temperature

D. None of these

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The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because

A. the ringing is not loud enough

B. the glass of the bell jar absorbs the sound waves

C. the bell jar is too small

D. there is no air or -any other gas in the bell jar

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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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4

Radio waves sent out by radio stations are reflected by

A. troposphere

B. stratosphere

C. mesosphere

D. ionosphere

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The world's first artificial satellite Sputnik I was launched by Russia in

A. 1985

B. 1957

C. 1959

D. 1960

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Sound waves in air are

A. transverse

B. longitudinal

C. transverse and longitudinal

D. neither transverse nor longitudinal

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Electromagnets are used in

A. the telephone ear piece

B. the telegraph

C. the electric bell

D. All the above

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The speed of light is minimum while passing through

A. air

B. glass

C. vacuum

D. water

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If an object is placed between two parallel plane mirrors, the number of images formed will be

A. 1

B. infinite

C. 0

D. 4

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A man weighing 50 kg floats on water in a lake. His apparent weight is

A. 50 kg

B. 45 kg

C. zero

D. 150 kg

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4

We always see only one side of the moon because

A. the sun comes in between the earth and moon

B. the moon is stationary

C. the time taken by the moon to rotate on its axis is the same as the time taken by it to revolve round the earth

D. moon revolves round the sun

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The stars that shine brightly then dimly and then brightly are known as

A. meteors

B. binaries

C. variable stars

D. bright stars

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When we sweat, we feel comfortable under a fan because

A. the air circulated by the fan is cool

B. the fan produces convection currents of air

C. the air circulated by the fan quickens the evaporation of the moisture on our skin

D. the air takes away the heat from our body

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4

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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Who discovered that the Cree Call acceleration Is the same for any object at a given place?

A. Newton

B. Pascal

C. Archimedes

D. Galileo

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Which force is used when milk is churned to separate cream?

A. cohesive

B. centrifugal

C. frictional

D. gravitational

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Rain drops acquire spherical shape due to

A. viscosity

B. surface tension

C. friction

D. elasticity

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4

In the nucleus of an atom, the uncharged particle is

A. proton

B. neutron

C. electron

D. positron

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The earth satellite Aryabhatta was put in orbit by India on

A. October 20, 1978

B. November 14, 1978

C. January 26, 1979

D. April 19, 1975

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4

The maximum displacement of the particle in a mechanical wave motion is known as

A. amplitude

B. vibration

C. frequency

D. phase

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It is more difficult to walk on ice than on a concrete road because

A. there is very little friction between the ice and feet pressing it

B. ice is soft when compared to concrete

C. there is more friction between the ice and feet

D. None of the above

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4

Holography is the technique of

A. taking photos of various objects

B. recording and reproducing three dimensional images

C. tracing out planets and stars in the sky

D. transmitting light waves

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4

The scientist who first sent electromagnetic waves to distant places was

A. James Clerk Maxwell

B. Heinrich Hertz

C. Thomas Alva Edison

D. Baird

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4

The speed of sound in a medium depends upon the properties of the medium such as

A. its density

B. its temperature

C. its elasticity

D. All the above

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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

An electric charge is measured in

A. coulomb

B. ampere

C. volt

D. watt