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Current Affairs January 2024

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4

Which physical quantity is measured in watts

A. power

B. kinetic energy

C. momentum

D. impulse

Correct Answer :

A. power


Related Questions

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The instrument used to measure atmospheric pressure is

A. Pyrometer

B. Eudiometer

C. Barometer

D. Hydrometer

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The instrument used to measure the strength of electric current at a point is

A. Ammeter

B. Altimeter

C. Adrinometer

D. Anemometer

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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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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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The planet that is known as earth's twin is

A. Mercury

B. Venus

C. Moon

D. Mars

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The planet with the reddish tinge is

A. Jupiter

B. Mars

C. Mercury

D. Saturn

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If you want a sound proof room, the walls should be

A. able to refract the sound

B. good absorbers of sound

C. good reflectors of sound

D. All the above

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A stationary elevated object has

A. kinetic energy

B. potential energy

C. momentum

D. both potential and kinetic energy

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The period of a geostationary (synchronous) satellite orbiting the earth over the equator la

A. 16 hours

B. 12 hours

C. 20 hours

D. 24 hours

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A photon is

A. a quantum of electromagnetic radiation

B. light source used in photography

C. a photo film

D. sun-light

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The audible range of a normal human ear is frequencies ranging from

A. 10000 to 20000 Hz

B. 50 to 15000 Hz

C. 20 to 20000 Hz

D. 15 to 50000 Hz

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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 heat produced in a conductor due to the passage of a current through it is proportional to

A. the square of the current

B. the resistance of the conductor

C. the time for which the current flows

D. All the above

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An ammeter has

A. a high resistance

B. a very low resistance

C. no resistance at all

D. resistance of 400 ? w

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Gamma radiations are used for

A. sterilising food stuff

B. controlling pests

C. cancer therapy

D. All of these

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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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Diamond shines because of its

A. purity

B. hardness

C. high density

D. high refractive index and low critical angle

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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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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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The tiniest of the stars belong to the group known as

A. Giant stars

B. White Dwarf stars

C. Neutron stars

D. Super-giant stars

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The attraction between similar molecules is called

A. inertia

B. adhesion

C. cohesion

D. friction

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The study of astronomy include a

A. astrology

B. astrophysics

C. astrometry

D. Both (b) and (c) above

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A body has fallen from a height. Just before touching the pound it has

A. lost all its potential energy and gained an equivalent amount of kinetic energy

B. gained potential energy and lost kinetic energy

C. gained kinetic energy as well as potential energy

D. lost kinetic energy as well as potential energy

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Radio waves sent out by radio stations are reflected by

A. troposphere

B. stratosphere

C. mesosphere

D. ionosphere

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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

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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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When an incident beam of light strikes the surface of a glass slab normally, the refracted beam

A. goes straight through without bending

B. gets deviated away from the normal

C. gets bent towards the normal

D. gets reflected

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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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The unit of power in SI is

A. Joule

B. Newton

C. Joule/Sec

D. Erg/Sec

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Ultrasonic waves are used

A. in medical and surgical diagnosis

B. in testing the quality of the linings and pads used in vehicles and aircraft brakes

C. to clean surgical instruments, jewellery and similar articles

D. All the above