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Current Affairs January 2024

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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

Correct Answer :

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


Related Questions

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4

A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is

A. greater than the weight of the man

B. less than the weight of the man

C. same as the weight of the man

D. zero

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4

When a bottle of perfume is opened in one corner of a room the smell spreads soon throughout the room. This is an example of

A. surface tension

B. capillarity

C. viscosity

D. diffusion

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4

The plants in a greenhouse are enclosed in a glass enclosure because

A. glass allows the heat radiations of shorter wavelengths from the sun to pass through

B. the plants absorb them - these shorter wavelengths - and reradiate them in the form of longer wavelengths

C. the longer wavelengths cannot penetrate through the glass walls

D. All the above

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4

The Milky Way is

A. the path of a star which is nearest to the earth

B. a galaxy which includes the sun

C. a star that is nearest to the earth

D. None of these

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4

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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4

Which is the densest planet of the solar system?

A. Sun

B. Jupiter

C. Mercury

D. Earth

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4

Electron-volt is a unit of

A. power

B. velocity

C. energy widely used in nuclear physics

D. number of electrons

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4

When ice just melts

A. there is no change in volume

B. there is no change in temperature

C. heat is given out

D. there is no change of state

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4

The pressure of air at high altitude is less than the atmospheric pressure at the sea level. Hence the boning point of water at a hill top

A. is more than at sea level

B. is equal to that sea level

C. is less than at sea level

D. depends on the surrounding temperature

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4

The enormous energy released in nuclear and thermonuclear reactions is due to conversion of

A. chemical energy into heat energy

B. mechanical energy into heat energy

C. protons into neutrons

D. mass into energy according to Einstein's equation

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4

The speed of light is minimum while passing through

A. air

B. glass

C. vacuum

D. water

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4

When are temperature resistance

A. increases

B. decreases

C. remains the same

D. first increases then decreases

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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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4

The radius of an atom is approximately

A. 10-10 cm

B. 10-12 cm

C. 10-13 cm

D. 10-16 cm

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4

The overhead wires supported by high towers in the grid system carry

A. alternating current of very high frequency

B. alternating current of very high voltage

C. a very large direct current

D. a high voltage direct current

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4

The velocity required to place a vehicle in orbit round the moon is _________ that required to place it in orbit round the earth.

A. less than

B. greater than

C. equal to

D. greater than or equal to

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4

Moon has no atmosphere because

A. it has no population

B. it is quite far off

C. its surface is full of rocks

D. its gravity is not sufficient for any atmosphere to hold on to it

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4

In a freezer ice cubes will be formed more quickly in trays made of

A. rubber

B. plastic

C. aluminium

D. wood

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4

The phenomenon of radioactivity was discovered by

A. Rutherford

B. Bohr

C. Henri Bacquerel

D. Marie Curie

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4

Which of the following is wrongly matched?

A. electric current - ampere

B. resistance - Ohm

C. electric power - volt

D. electric charge Coulomb

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4

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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4

The image formed by a plane mirror is

A. of the same size as the object

B. at the same distance behind the mirror as the object is in front of it

C. virtual and laterally inverted

D. All the above

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4

Solids have definite shapes. This is because

A. the forces of cohesion of the molecules within are very much less in them

B. the forces of cohesion are very large

C. the forces of adhesion are large

D. the forces of adhesion are less

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4

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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4

A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be

A. a parabola

B. a horizontal straight line

C. a vertical straight line

D. a circle

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4

The device for tracking and locating the position of a moving object in space is called

A. Space ship

B. Lunar module

C. Radar

D. Rocket

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4

A bar magnet tied in the middle with a thread is suspended at the South Pole of the earth. The magnet will be in

A. a horizontal position

B. a nearly vertical position with its South Pole downwards

C. a nearly vertical position with its North Pole downwards

D. a slanting position

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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

A star contains

A. about 75% of hydrogen

B. 22% helium

C. traces of most other elements including oxygen, neon, carbon and nitrogen

D. All the above

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4

A piece of cork la embedded inside an ice block which floats in water. What will happen to the level of water when all ice melts?

A. It will go down

B. It will come up

C. It will remain at the same level

D. First it will go down and it will come up