Home
Current Affairs January 2024

What is the correct answer?

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

Correct Answer :

C. James Chadwick


Related Questions

What is the correct answer?

4

When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon Is known as

A. doppler effect

B. beats

C. resonance

D. echo

What is the correct answer?

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

What is the correct answer?

4

A heavenly body similar in nature to the sun intensely hot glowing mass that produces its energy by thermonuclear reactions is

A. a planet

B. a meteor

C. a star

D. a comet

What is the correct answer?

4

A man weighing 50 kg floats on water in a lake. His apparent weight is

A. 50 kg

B. 45 kg

C. zero

D. 150 kg

What is the correct answer?

4

The maximum range of most TV signals is from 121 to 240 km only because

A. the curvature of earth limits the range of reception

B. the signals are weak

C. the signals are absorbed by air

D. the antennae are not powerful enough

What is the correct answer?

4

Electromagnets are used in

A. the telephone ear piece

B. the telegraph

C. the electric bell

D. All the above

What is the correct answer?

4

A piece of ice is Boating In water kept in a beaker. When all the ice melts the level of water will

A. first rise and then fall

B. fall

C. remain the same

D. rise

What is the correct answer?

4

Red Light is used as a dancer signal because

A. it is pleasing to the eye

B. it has a traditional colour

C. it is easily distinguishable

D. it is most sensitive to the human eye

What is the correct answer?

4

A photon is

A. a quantum of electromagnetic radiation

B. light source used in photography

C. a photo film

D. sun-light

What is the correct answer?

4

Where does the centre of gravity of a rubber ring lie?

A. on the outer surface

B. in the inner surface

C. at the centre of the ring

D. None of the above

What is the correct answer?

4

The mixing up of two gases as a result of random motion of molecules is called

A. diffusion

B. effusion

C. vaporisation

D. sublimation

What is the correct answer?

4

Chronometer is an instrument to measure

A. heat

B. electric potential

C. time

D. distance between two points

What is the correct answer?

4

Formation of shadows can be explained by

A. rectilinear propagation of light

B. reflection

C. refraction

D. total internal reflection

What is the correct answer?

4

Which mirror is used as a rear view mirror in Vehicles?

A. Parabolic

B. Convex

C. Concave

D. Plain

What is the correct answer?

4

Alternating Current (AC) is more advantageous than direct current because

A. it can be transmitted easily and efficiently

B. Alternating Current (AC) loses the least amount of energy when transmitted at high voltages

C. Alternating Current (AC) voltage can be easily increased or decreased

D. all the above

What is the correct answer?

4

In the visible spectrum which colour has the shortest wavelength?

A. Red

B. Blue

C. Yellow

D. Violet

What is the correct answer?

4

A sensitive instrument susceptible to magnetic infiuence can be protected from external magnetic field by

A. enclosing it in a thick walled iron box

B. wrapping it with an insulator

C. by placing it inside a glass case

D. by surrounding it with fine copper gauze

What is the correct answer?

4

A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

A. the ball will travel towards the centre of the circle and fall down

B. it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

C. it will fall down at the same place where the string breaks

D. None of these

What is the correct answer?

4

The escape velocity of a satellite projected from the surface of the earth is independent of

A. the mass of earth

B. the mass of the satellite

C. the radius of the earth

D. gravitation of the earth

What is the correct answer?

4

Mica is used in an electric iron because it is a

A. good conductor of heat

B. good conductor of electricity

C. bad conductor of electricity

D. Both (a) and (b) above

What is the correct answer?

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

What is the correct answer?

4

When we tighten the string of a sitar or tanpura its pitch

A. remains the same

B. increases

C. decreases

D. None of the above

What is the correct answer?

4

The instrument used to measure atmospheric pressure is

A. Pyrometer

B. Eudiometer

C. Barometer

D. Hydrometer

What is the correct answer?

4

When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light ray diminishes alter a few reflections. This is because of

A. poor reflection from the mirrors

B. scattering of light from the mirrors

C. absorption of some light by the mirrors

D. absorption of light by the atmosphere

What is the correct answer?

4

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

A. capillarity

B. cohesion

C. adhesion

D. viscosity

What is the correct answer?

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

What is the correct answer?

4

To concentrate light on the defective teeth, the dentists use

A. convex mirrors

B. concave mirrors

C. convex lens

D. concave lens

What is the correct answer?

4

The attraction between similar molecules is called

A. inertia

B. adhesion

C. cohesion

D. friction

What is the correct answer?

4

Powder clings to the skin because of

A. cohesion

B. adhesion

C. capillary action

D. absorption

What is the correct answer?

4

The inability of a body to change its state of rest or uniform motion along a straight line is called its

A. momentum

B. velocity

C. acceleration

D. inertia