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Current Affairs January 2024

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4

A solar eclipse occurs when the earth, the sun and the moon are in a straight line, and

A. when the moon passes between the sun and the earth

B. when the sun comes between the earth and the moon

C. when the earth comes between the sun and the moon

D. on a full moon day

Correct Answer :

A. when the moon passes between the sun and the earth


Related Questions

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Which of the following pairs is not correct?

A. Television - Baird

B. Transistor ~ Shockley

C. Thermometer - Celsius

D. Barometer Torricelli

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A projectile is fired at an angle with the horizontal with a small velocity. Its horizontal range will be maximum when the angle with the horizontal is

A.

B. 30°

C. 45°

D. 60°

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4

The planet with the reddish tinge is

A. Jupiter

B. Mars

C. Mercury

D. Saturn

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Solar radiation is preferred to other sources of energy because

A. it is practically inexhaustible

B. it is the cheapest form of energy

C. it does not cause pollution

D. All of the above

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4

On applying a constant force to a mass, It moves with a uniform

A. velocity

B. momentum

C. acceleration

D. angular velocity

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The stem of a vibrating tuning fork is pressed against a sound box. Then

A. the loudness of the sound increases

B. the loudness remains the same

C. the loudness decreases

D. the sound suddenly stops

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4

Radio waves sent out by radio stations are reflected by

A. troposphere

B. stratosphere

C. mesosphere

D. ionosphere

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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 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

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

A device used in a ship for the purpose of measuring the depth of the sea is

A. an altimeter

B. a fathometer

C. a hydrometer

D. a sonometer

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4

The focal length or lens or the eye is under the control or the

A. iris

B. pupil

C. ciliary body

D. cornea

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The star nearest to the sun is

A. Proxima Centauri

B. Sirius

C. Aldebaran

D. Vega

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A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan

A. increases

B. decreases

C. remains the same

D. first increases and then decreases

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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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An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or

A. sugar

B. sodium carbonate

C. common salt

D. carbonates of calcium and magnesium

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4

A spherical mirror is

A. a reflecting elliptical portion

B. a reflecting spherical surface

C. a parabolic reflecting surface

D. a flat reflecting surface

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Electromagnets are used in

A. the telephone ear piece

B. the telegraph

C. the electric bell

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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The filament used in the electric lamp is made of

A. nichrome

B. tungsten

C. copper

D. aluminium

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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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An electric fan converts

A. electrical energy into heat energy

B. electrical energy into mechanical energy

C. mechanical energy into electrical energy

D. mechanical energy into heat energy

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4

A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance

A. will increase

B. will decrease

C. does not change

D. varies with the increase of depth of the immersion of the iron piece

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4

The scientist who first sent electromagnetic waves to distant places was

A. James Clerk Maxwell

B. Heinrich Hertz

C. Thomas Alva Edison

D. Baird

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When sound waves travel from one medium to another, the quantity which remains unchanged is its

A. speed

B. frequency

C. wavelength

D. All the above

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The following are the atmospheric zones above the surface of the earth:
A) Troposphere
B) Ionosphere
C) Stratosphere
D) Exosphere
Select the correct sequence from the earth's surface on the basis of the codes given below:

A. ACBD

B. ABCD

C. CABD

D. BACD

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4

A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will

A. increase

B. decrease

C. remain unaffected

D. have its shape changed

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Isotones are species of atoms containing

A. same number of protons but different number of neutrons

B. same number of neutrons but different number of protons

C. the same total number of protons and neutrons

D. same number of protons and different number of electrons

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4

The heating element often used in an electric iron is

A. copper

B. tungsten

C. mica

D. nichrome

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In compact porous soil, the rising of the water is due to

A. capillarity

B. cohesion

C. adhesion

D. viscosity