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Current Affairs January 2024

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4

A man Jumping out of a moving train is thrown

A. forward

B. backward

C. sideways

D. None of the above

Correct Answer :

A. forward


Related Questions

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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

The strength of an electromagnet can be increased by

A. increasing the length of the coiled wire

B. increasing current supply

C. increasing the size of the iron core

D. All the above

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4

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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4

Photocells are used

A. in burglar alarms

B. in automotive devices for light switches

C. television cameras

D. All the above

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4

The brightest star visible to the naked eye is

A. Sirius

B. Vega

C. Rigel

D. Proxima Centauri

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4

When the velocity of a body is halved

A. its momentum is halved

B. its kinetic energy is halved

C. its acceleration is halved

D. its potential energy is halved

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4

Increase in pressure

A. increases the melting point of ice

B. decreases the melting point of ice

C. has no effect on the melting point of ice

D. increases the volume of the ice

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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 rings of Saturn were discovered by

A. Galileo

B. Bhaskara

C. Aryabhatta

D. Ptolemy

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4

The rings of Saturn were discovered by

A. Galileo

B. Bhaskara

C. Aryabhatta

D. Ptolemy

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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

Which of the following is fissionable?

A. U-234

B. U-235

C. U-238

D. Both (b) and (c)

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4

In hot climatic conditions, the buildings are painted white because

A. white paint is economical

B. it does not fade off

C. it does not crack with higher temperature

D. white coating is a bad conductor of heat and reflects heat rays that fall on it, thus keeping the inside cool

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4

The direction of heat flow between two objects depends on

A. their heat contents

B. their masses

C. their temperatures

D. whether they are in solid, liquid or gaseous state

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4

For an electron orbiting in a hydrogen atom, the necessary centripetal force keeping it in orbit is provided by

A. the electrical attraction between the negatively charged electron and the positively charged porton

B. the high speed of the electron

C. the low speed of the electron

D. gravity

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4

Powder clings to the skin because of

A. cohesion

B. adhesion

C. capillary action

D. absorption

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4

To produce beats it is necessary to have two waves

A. travelling in opposite direction

B. of slightly different frequencies

C. of equal wavelength

D. of equal amplitude

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4

The electron has a mass equal to

A. 1.9 x 10-13 kg

B. 9.1 x 10-31 kg

C. 1 x 10-15 kg

D. 1.6 x 10-19 kg

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4

Cosmic rays are

A. powerful X-rays falling on the earth from space

B. ultraviolet rays from the sun

C. gamma rays from radioactive minerals

D. very energetic radiation falling upon the earth from outer space consisting chiefly of charged particles

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4

Increase in pressure

A. has no effect on the boiling point of a liquid

B. raises the boiling point of a liquid

C. lowers the boiling point of a liquid

D. increases the volume of a liquid

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4

The brightest star visible to the naked eye is

A. Sirius

B. Vega

C. Rigel

D. Proxima Centauri

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4

When a bullet is fired from a gun

A. the gun moves forward

B. the gun jumps up

C. the gun does not move

D. the gun recoils with the same momentum as the bullet

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4

Why is nuclear fusion also known as thermonuclear reaction?

A. Fusion converts nuclear energy into heat

B. Fusion demands conditions of extremely high temperature to produce it

C. Fusion produces large amount of heat

D. Fusion reactions takes place in the sun

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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 motion .of the pendulum of a wall clock is an example of

A. linear motion

B. vibratory motion

C. rotational motion

D. None of the above

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4

A simple mercury barometer is found in a slightly slanting position. The atmospheric pressure

A. is found by measuring the slanting height of the mercury column

B. is given by the vertical height

C. cannot be measured with it

D. u) can be measured by both the methods described above

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4

A hydraulic brake in an automobile uses

A. a fluid to transmit the braking force

B. the force applied by the driver

C. hydrogen gas and not any liquid

D. a vacuum brake

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4

We always see only one side of the moon because

A. the sun comes in between the earth and moon

B. the moon is stationary

C. the time taken by the moon to rotate on its axis is the same as the time taken by it to revolve round the earth

D. moon revolves round the sun

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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

Which physical quantity is measured in watts

A. power

B. kinetic energy

C. momentum

D. impulse