Home
Current Affairs January 2024

What is the correct answer?

4

The extremely luminous objects located at the centre of some distant galaxies and which are sources of high energy electromagnetic radiation are known as

A. Nebulae

B. Quasars

C. Meteors

D. Comets

Correct Answer :

B. Quasars


Related Questions

What is the correct answer?

4

A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will

A. increase

B. decrease

C. remain the same

D. first decrease and then increase

What is the correct answer?

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

What is the correct answer?

4

Air pressure is usually highest when the air is

A. warm and moist

B. cool and dry

C. warm and dry

D. cool and moist

What is the correct answer?

4

Which of the following rays has the highest penetrative power?

A. �± -rays

B. �² -rays

C. �³ -rays

D. X-rays

What is the correct answer?

4

The heat produced in a conductor due to the passage of a current through it is proportional to

A. the square of the current

B. the resistance of the conductor

C. the time for which the current flows

D. All the above

What is the correct answer?

4

Sun spots are

A. the mountains found on the surface of the Sun

B. the dark patches on the sun having less temperature than the normal sun's surface

C. ionized gas found near the solar surface

D. the magnetic storms on the surface of the Sun

What is the correct answer?

4

A piece of ice is Boating In water kept in a beaker. When all the ice melts the level of water will

A. first rise and then fall

B. fall

C. remain the same

D. rise

What is the correct answer?

4

The following are the atmospheric zones above the surface of the earth:
A) Troposphere
B) Ionosphere
C) Stratosphere
D) Exosphere
Select the correct sequence from the earth's surface on the basis of the codes given below:

A. ACBD

B. ABCD

C. CABD

D. BACD

What is the correct answer?

4

The acoustical quality of a room depends on

A. the size and shape of the room

B. the ability of the ceiling, walls and floor to exclude unwanted sound

C. the use of furnishings made of sound absorbing materials

D. All the above

What is the correct answer?

4

If an empty cylinder Is half ruled with a liquid, Its centre of gravity is

A. shifted upwards

B. shifted downwards

C. shifted neither upward nor downward

D. shifted upward or downward depending on the density of the liquid

What is the correct answer?

4

Which of the following apparatus is used in the electrolysis of water?

A. Voltmeter

B. Voltameter

C. Ammeter

D. Potentiometer

What is the correct answer?

4

Halley's comet appears in the heavens once in

A. 40 years

B. 50 years

C. 76 years

D. 80 years

What is the correct answer?

4

When light passes from air to glass, its velocity in glass

A. increases

B. decreases

C. remains unchanged

D. first decreases then increases

What is the correct answer?

4

X-rays were discovered by

A. Wilhelm Roentgen

B. WO Coolidge

C. Henry Cavendish

D. William Watson

What is the correct answer?

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

What is the correct answer?

4

Thick brick walls are used in the construction or a cold storage because bricks

A. are good conductors of heat

B. are cheaper

C. are easily obtained

D. are bad conductors of heat

What is the correct answer?

4

The property of a fluid by which it resists relative motion within itself is known as

A. cohesive force

B. surface tension

C. diffusion

D. viscosity

What is the correct answer?

4

The period of oscillation of a simple pendulum depends upon

A. the mass of its bob

B. the material of the bob

C. the amplitude of vibration

D. acceleration due to the gravity at the site of experiment

What is the correct answer?

4

The phenomenon of radioactivity was discovered by

A. Rutherford

B. Bohr

C. Henri Bacquerel

D. Marie Curie

What is the correct answer?

4

Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because

A. both walls are silvered on the vacuum side

B. there is vacuum between the double walls

C. the cork is a poor conductor of heat

D. of all the above

What is the correct answer?

4

Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water

A. increases to a great extent

B. increases slightly

C. decreases slightly

D. decreases rapidly

What is the correct answer?

4

We see the flash of lightning before hearing the thunder because

A. light travels very much faster than sound

B. sound travels faster than light

C. lightning occurs nearer than thunder

D. both travel at the same speed

What is the correct answer?

4

The radius of curvature of a spherical mirror is

A. equal to half its focal length

B. equal to its focal length

C. twice its focal length

D. not related to its focal length

What is the correct answer?

4

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

What is the correct answer?

4

Which of the following wires of same dimensions offers least resistance to the ,flow of current?

A. copper

B. aluminium

C. silver

D. nichrome

What is the correct answer?

4

Which is the densest planet of the solar system?

A. Sun

B. Jupiter

C. Mercury

D. Earth

What is the correct answer?

4

A heavenly body similar in nature to the sun intensely hot glowing mass that produces its energy by thermonuclear reactions is

A. a planet

B. a meteor

C. a star

D. a comet

What is the correct answer?

4

Credit for starting Space Science Research in India goes to

A. HJ Bhabha

B. SS Bhatnagar

C. V Sarabhai

D. CV Raman

What is the correct answer?

4

A series of east moving still pictures can be made to appear as a moving picture because the eye

A. can focus very rapidly as pictures change

B. is quicker than the brain

C. can see two images separated only if the interval' between seeing them is more than' one-tenth of a second

D. can shut out some of the light

What is the correct answer?

4

Enriched uranium means

A. Uranium that is very pure

B. Uranium in which the concentration of the isotope U-238 is more than in the naturally occuring uranium

C. Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium

D. None of the above