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Current Affairs January 2024

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4

Acoustics is a property or

A. Physics

B. Chemistry

C. Biology

D. Economic

Correct Answer :

A. Physics


Related Questions

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4

Body A is kept in contact with body B. Heat will flow from A to B if

A. the heat content of A is greater than that of B

B. the temperature of A is greater than that of B

C. the specific heat of A is greater than that of B

D. the specific heat of B is greater than that of A

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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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4

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

The velocity of sound in air increases with

A. the rise of temperature

B. rise of its frequency

C. decrease in humidity

D. fall of temperature

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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

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4

Acoustics is a property or

A. Physics

B. Chemistry

C. Biology

D. Economic

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4

A timer in a race is at the finish line. He should start his stop watch

A. as soon as he hears the report of the gun

B. the moment he sees the flash

C. either (a) or (b) since that makes no difference

D. None of the above

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4

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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4

How is it that Pluto is not always the farthest planet of the solar system?

A. Each planet becomes the farthest planet in its turn. Now it is the turn of Piuto

B. The Sun is now in the zodiac in which it is nearest to outer planets

C. The eccentricity of Piuto's orbit being substantial, this orbit cuts the orbit of Neptune

D. Piuto belongs to other solar system

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4

Galaxies emit

A. radio waves and X-rays

B. ultraviolet light waves

C. visible light waves

D. All the above

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4

The function of a ruse wire is

A. to stabilise the voltage

B. to decrease the current supply

C. to increase the current supply

D. to prevent an unduly high current from passing through a circuit

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4

Of the following types of electromagnetic radiation which has the longest wavelength?

A. ultraviolet rays

B. gamma rays

C. radio waves

D. infrared waves

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4

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

A. increases

B. decreases

C. remains unchanged

D. first decreases then increases

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4

The solar wind is composed of

A. outward stream of protons and electrons on the surface of the sun during solar flares and sun-spot activity

B. plasma

C. ionized gas

D. All of these

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4

Primary colours are

A. colours of the rainbow

B. colours in the spectrum of white light

C. colours which cannot be produced by mixing other colours

D. colours found in nature

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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

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4

When a whistling engine approaches a person standing on the platform, the frequency or the note

A. appears to increase

B. appears to decrease

C. does not change at all

D. first increases then decreases

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4

Before the invention of geostationary satellites, television stations could not transmit their programmes to far off places because

A. these signals are electromagnetic in nature

B. these are not electromagnetic in nature

C. their wavelength is very large

D. they are not reflected by the ionosphere but pass through it

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4

The Indian Satellite System used for domestic communications, television and meteorology is known as

A. INSAT

B. Bhaskara

C. Aryabhatta

D. All the above

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4

The Solar System lies near the edge of a galaxy known as

A. The Milky Way

B. Radio Galaxy

C. Andromeda Nebula

D. Magellanic Clouds

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4

When a whistling engine approaches a person standing on the platform, the frequency or the note

A. appears to increase

B. appears to decrease

C. does not change at all

D. first increases then decreases

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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 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

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4

While crossing a suspension bridge, the soldiers are ordered to break steps because

A. the marching in steps will involve a big strain on them

B. the resonant vibrations caused by their marching can damage the bridge increasing the amplitude to dangerous proportions

C. the marching may obstruct other traffic

D. rumblings of their marching may disturb the surroundings

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4

A man Jumping out of a moving train is thrown

A. forward

B. backward

C. sideways

D. None of the above

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4

The electroplating of a metallic article

A. protects the article from atmospheric corrosion

B. gives it a more attractive appearance

C. Both (a) and (b) above

D. None of the above

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4

The largest planet in the solar system is

A. Neptune

B. Uranus

C. Jupiter

D. Saturn

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4

When a body is projected upwards

A. the time for the upward journey and downward journey are the same

B. the upward journey takes more time

C. the downward journey takes more time

D. Can't be said

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4

Which of the following pairs is not correct?

A. Television - Baird

B. Transistor ~ Shockley

C. Thermometer - Celsius

D. Barometer Torricelli

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4

The source of electric energy in an artificial satellite is

A. mininuclear reactor

B. a dynamo

C. a thermopile

D. solar cells