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Current Affairs January 2024

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Which of the following can produce electricity?

A. resistor

B. thermocouple

C. light bulb

D. neon tube

Correct Answer :

B. thermocouple


Related Questions

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Rays similar to X-rays but of smaller wave length that are given off by radioactive substances are

A. �± -rays

B. �² -rays

C. �³ -rays

D. Cosmic rays

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To produce beats it is necessary to have two waves

A. travelling in opposite direction

B. of slightly different frequencies

C. of equal wavelength

D. of equal amplitude

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The transistor was invented by

A. Marconi

B. Baird

C. John Bardeen, Walter H. Brattain and William Shockley

D. Edison

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The colour of a star is an indication of its

A. distance from the earth

B. age

C. temperature

D. size

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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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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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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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Metals are good conductors of heat because

A. they contain free electrons

B. their atoms are relatively far apart

C. their atoms collide frequently

D. they have reflecting surfaces

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The earth's nearest neighbour in space is

A. the Sun

B. the Moon

C. the Venus

D. the Mars

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The method used to separate aluminium from a alumina is

A. electroplating

B. electrotyping

C. electrolysis

D. distillation

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Among the following the most suitable material for the core of an electro-magnet is

A. steel

B. wood

C. soft iron

D. copper

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The asteroids belt lies between the orbits of

A. Earth and Mars

B. Venus and Earth

C. Mars and Jupiter

D. Moon and Mars

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A hydrogen bomb is based on

A. nuclear fusion

B. nuclear fission

C. Both (a) and (b) above

D. Neither (a) nor (b)

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Where does the centre of gravity of a rubber ring lie?

A. on the outer surface

B. in the inner surface

C. at the centre of the ring

D. None of the above

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Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.

A. rough white

B. rough black

C. shining white

D. shining black

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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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When the disturbed electrons of an exited atom transfer back into lower energy levels they emit energy in the form of electromagnetic wave pulses called

A. neutrons

B. electrons

C. phonons

D. photons

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In the fuse of an electrical installation blows out

A. replace the fuse by a thin wire

B. replace the fuse by a thick copper wire

C. replace the fuse by a fuse wire of proper rating

D. replace the fuse by nichrome wire

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In a dynamo

A. mechanical energy is converted to light energy

B. mechanical energy is converted to heat energy

C. mechanical energy is converted to electrical energy

D. electrical energy is converted to mechanical energy

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The ballistic missile, Agni 11, tested by India has a maximum range of

A. 1000 km

B. 1500 km

C. 2000 km

D. 500 km

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A bullet is fired at a certain angle with the horizontal. Its path will be

A. elliptical

B. a straight line

C. a parabola

D. a vertical line

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No current will flow between two charged bodies if they have the same

A. resistance

B. charge

C. potential

D. charge/potential ratio

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The principle on which a Jet engine works is

A. conservation of mass

B. Newtonian law of action and reaction

C. conservation of angular momentum

D. None of the above

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Some persons are not able to see distant objects clearly because the image of the object is focused in front of the retina. This defect is known as

A. short sight

B. long sight

C. astigmatism

D. presbyopia

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The planet with the reddish tinge is

A. Jupiter

B. Mars

C. Mercury

D. Saturn

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A rod of brass la held in hand and rubbed with fur. The rod is found to have

A. no charge

B. positive charge

C. negative charge

D. can't be said

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Which of the following is known as freon?

A. Liquid ammonia

B. Carbon tetrafluoride

C. Dichloro-difluoro-methane

D. Sulphur dioxide

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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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A temperature below absolute zero for an ideal gas

A. cannot be attained experimentally

B. can be attained

C. is impossible

D. Does not exist at all

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A proton is

A. the ionised hydrogen molecule

B. the nucleus of helium atom

C. the nucleus of hydrogen atom

D. the positive counterpart of electron