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Current Affairs January 2024

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4

A cyclist leans inwards when he is negotiating a curve 10 that

A. he may increase his speed

B. his weight may be reduced

C. necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion

D. no frictional force may be produced between the wheels and the axle

Correct Answer :

C. necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion


Related Questions

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4

Bats flying in the dark avoid obstacles because

A. they can see very dearly only in darkness

B. they produce ultrasonic waves which guide them

C. their eyes are sensitive to darkness

D. their eye holes expand in darkness

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4

The study of astronomy include a

A. astrology

B. astrophysics

C. astrometry

D. Both (b) and (c) above

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4

Which of the following can produce electricity?

A. resistor

B. thermocouple

C. light bulb

D. neon tube

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4

The heat generated in a conductor carrying current is proportional to

A. the resistance

B. the square of the current flowing through it

C. the time the current flows

D. All the above

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4

Heat transfer

A. cools the body that transfers it

B. heats the body that absorbs the heat

C. may change the physical state of the substance

D. All the above

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4

The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation is

A. Hygrometer

B. Hypsometer

C. Hydrometer

D. Densimeter

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4

The mixing up of two gases as a result of random motion of molecules is called

A. diffusion

B. effusion

C. vaporisation

D. sublimation

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4

The filament lamp is an example for

A. fluorescence

B. incandescence

C. both (a) and (b)

D. None of these

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4

Separating particles from a suspension is effected by

A. centrifugal force

B. frictional force

C. gravitational force

D. distillation

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4

Commonly used safety fuse wire is made of

A. Tin

B. Lead

C. Nickel

D. An alloy of tin and lead

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4

A convex mirror always produces

A. an erect, virtual image of diminished size

B. an erect, real image of diminished size

C. an erect, real image of double size

D. a virtual image of double size

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4

The method used to separate aluminium from a alumina is

A. electroplating

B. electrotyping

C. electrolysis

D. distillation

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4

Two tumblers stuck together can be separated by

A. pouring ice cold water into the inner tumbler

B. pouring ice cold water on the outer tumbler

C. pouring hot water into the inner tumbler

D. dipping both the tumblers in hot water

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4

The nuclear model of atom was first visualised by

A. Rutherford

B. Neils Bohr

C. Albert Einstein

D. JJ Thompson

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4

If you want to open a door with les difficulty you push it

A. at the middle

B. at a point away from the hinge (near the rim)

C. near the hinge

D. None of the above

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4

The end product in the uranium disintegration series is

A. lead

B. zinc

C. carbon

D. tin

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4

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

An ohm is a unit of

A. potential difference

B. resistance

C. current

D. All the above

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4

If a bar magnet is broken into two pieces

A. both pieces will lose their magnetism

B. one piece will have North Pole on both ends and the other South Pole on its both ends

C. each will remain a magnet with North Pole at one end and South Pole at the other

D. the longer piece will behave as a bar magnet while the smaller will have no magnetism at all

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4

The rate of cooling of a hot body depends on

A. the nature of the radiating surface

B. area of the radiating surface

C. temperature difference between the body and the surroundings

D. All the above

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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 velocity of sound in a medium is

A. directly proportional to its pressure

B. inversely proportional to the square root of its pressure

C. directly proportional to the square root of its pressure

D. independent of its pressure

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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

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4

The evaporation rate depends on

A. the nature of the liquid

B. area of the exposed surface of the liquid

C. temperature of air and of the liquid

D. All the above

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4

A proton is

A. a quantum of light energy

B. a quantum of matter

C. a positively charged atomic particle

D. another name for positron

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4

The cover of a solar cooker is made of glass because

A. it absorbs sun's rays

B. it reflects sun's rays

C. it retains the heat inside by the greenhouse effect

D. it radiates heat better than metals

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4

A thermostat is a device used

A. for automatically maintaining a steady temperature

B. for measuring electricity

C. to reduce the voltage of electricity

D. for producing heat

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4

Cosmic rays contain

A. protons and electrons

B. alpha particles

C. gamma rays

D. All the above

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4

A nuclear reactor is said to have become 'critical' when

A. it stops due to malfunctioning

B. it starts emitting dangerous radioactive radiations

C. it is shut down to avoid explosion

D. it is ready to produce controlled energy

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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