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Current Affairs January 2024

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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

Correct Answer :

A. pouring ice cold water into the inner tumbler


Related Questions

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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

The largest planet in the solar system is

A. Neptune

B. Uranus

C. Jupiter

D. Saturn

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4

The electrical domestic tube light gives white fiourescent light because of

A. collision between molecules of filled gas under electric current

B. heavy current

C. vacuum inside the tube

D. falling of ultra violet rays on the white inner coating of the tube

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4

A series of east moving still pictures can be made to appear as a moving picture because the eye

A. can focus very rapidly as pictures change

B. is quicker than the brain

C. can see two images separated only if the interval' between seeing them is more than' one-tenth of a second

D. can shut out some of the light

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4

Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water

A. increases to a great extent

B. increases slightly

C. decreases slightly

D. decreases rapidly

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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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4

When a particle in motion is acted upon by a force in a direction perpendicular to the direction of motion, the path followed by the particle will be

A. a straight line

B. an ellipse

C. a circle

D. a parabola

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4

When the earth reaches its perihelion

A. it is nearest to the moon

B. it is nearest to the sun

C. it is nearest to Pluto

D. it is farthest from the sun

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4

The speed of light is minimum while passing through

A. air

B. glass

C. vacuum

D. water

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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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4

The overhead wires supported by high towers in the grid system carry

A. alternating current of very high frequency

B. alternating current of very high voltage

C. a very large direct current

D. a high voltage direct current

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4

The colour or an opaque object is due to the colour it

A. absorbs

B. refracts

C. reflects

D. scatters

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4

Out of the following which element has the longest half-life period?

A. Radium

B. Radon

C. Uranium-238

D. Plutonium

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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

A light year means

A. a unit of time

B. a unit of length

C. a year of no consequence

D. illumination throughout the year

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4

Air pressure is usually highest when the air is

A. warm and moist

B. cool and dry

C. warm and dry

D. cool and moist

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4

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

When a bowler spins a ball, it changes its direction in the air. This is due to

A. turbulence caused by the wind

B. buoyancy of air

C. unequal pressures acting on it

D. sudden change in the direction of the wind

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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

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

We see the flash of lightning before hearing the thunder because

A. light travels very much faster than sound

B. sound travels faster than light

C. lightning occurs nearer than thunder

D. both travel at the same speed

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4

A pair of stars that revolve round each other is

A. a neutron star

B. a binary star

C. a dwarf star

D. a polar star

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4

The plants in a greenhouse are enclosed in a glass enclosure because

A. glass allows the heat radiations of shorter wavelengths from the sun to pass through

B. the plants absorb them - these shorter wavelengths - and reradiate them in the form of longer wavelengths

C. the longer wavelengths cannot penetrate through the glass walls

D. All the above

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4

The resistance of a wire depends on

A. the material of the wire

B. the length of the wire

C. the cross section of the wire

D. All the above

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4

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

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4

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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4

The weight of a body is

A. maximum at the equator

B. minimum at the equator

C. minimum at the poles

D. the same everywhere

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4

Which force is used when milk is churned to separate cream?

A. cohesive

B. centrifugal

C. frictional

D. gravitational

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4

Photoelectric cell is a device which converts

A. light energy into electrical energy

B. electrical energy into light energy

C. magnetic energy into electrical energy

D. electrical energy into mechanical energy

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4

When a swing is drawn to a side Its potential energy In relation to the earth

A. increases

B. decreases

C. remains the same

D. is constant