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Current Affairs January 2024

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4

At what temperature do the Fahrenheit and Celsius scales give the same reading?

A. 212°

B. 32°

C. -40°

D.

Correct Answer :

C. -40°


Related Questions

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4

A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

A. the floor and carpet are at different temperatures

B. the stone conveys the heat away from the feet more rapidly than the carpet

C. the carpet is a better conductor of heat than the stone

D. the human body maintains a constant temperature

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4

At what temperature do the Fahrenheit and Kelvin scales give the same reading?

A. 212°

B. 32°

C. -40°

D.

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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

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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

The image of an object formed in a plane mirror

A. is real

B. is virtual

C. can be obtained on a screen

D. is slightly bigger than the object

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4

A transformer

A. converts direct current into alternating current

B. converts alternating current into direct current

C. steps up or steps down a given alternating current voltage

D. supplies current with zero resistance

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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

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4

A permanent magnet may be demagnetised by

A. placing it inside a solenoid through which an alternating current is flowing

B. heating the magnet to redness and then allowing it to cool

C. dropping it several times or hammering it while lying east-west

D. All the above

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4

Acoustics is a property or

A. Physics

B. Chemistry

C. Biology

D. Economic

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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

The coil of an electric heater is made of

A. Platinum

B. Tungsten

C. Nichrome

D. Copper

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4

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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4

Velocity of sound in high altitudes is low because at such a height

A. the temperature is low

B. there is no air

C. the pressure is low

D. All the above

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4

The earth's nearest neighbour in space is

A. the Sun

B. the Moon

C. the Venus

D. the Mars

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4

In very cold countries alcohol is used as a thermometric liquid because

A. alcohol is a poor conductor of heat

B. alcohol can be coloured for its level to be seen easily

C. its freezing point is very low

D. it will not stick to the glass tube

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4

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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4

The image of an object formed in a plane mirror

A. is real

B. is virtual

C. can be obtained on a screen

D. is slightly bigger than the object

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4

The orbit of Venus lies between those of

A. Mercury and Earth

B. Earth and Mars

C. Mars and Saturn

D. Mars and Jupiter

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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

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

The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by

A. Irene Curie

B. W Bothe and H Becker

C. James Chadwick

D. Jean Joliot

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4

For detecting and, testing of small electric charges we use

A. an electrophorus

B. an electroscope

C. an electromagnet

D. an ammeter

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4

When water is cooled from 4�C to 2�C its density

A. increases

B. decreases

C. remains the same

D. first increases then decreases

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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

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4

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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4

When a body is immersed in a fluid the force of buoyancy of the fluid on the body depends on

A. the immersed volume of the body

B. density of the liquid

C. acceleration due to the gravity at the place

D. All the above

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4

The speed of sound in a medium depends upon the properties of the medium such as

A. its density

B. its temperature

C. its elasticity

D. All the above

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4

A stationary elevated object has

A. kinetic energy

B. potential energy

C. momentum

D. both potential and kinetic energy

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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

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

A. rubber

B. plastic

C. aluminium

D. wood