Home
Current Affairs January 2024

What is the correct answer?

4

If a bar magnet is broken into two pieces

A. both pieces will lose their magnetism

B. one piece will have North Pole on both ends and the other South Pole on its both ends

C. each will remain a magnet with North Pole at one end and South Pole at the other

D. the longer piece will behave as a bar magnet while the smaller will have no magnetism at all

Correct Answer :

C. each will remain a magnet with North Pole at one end and South Pole at the other


Related Questions

What is the correct answer?

4

The mass number and the atomic number of an element are X and Y respectively. The number oC neutrons in the atom of that element is

A. X

B. Y

C. X + Y

D. X Y

What is the correct answer?

4

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

A. absorbs

B. refracts

C. reflects

D. scatters

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

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

What is the correct answer?

4

Which of the following is not electromagnetic waves?

A. heat waves

B. sound waves

C. radio waves

D. light waves

What is the correct answer?

4

Enriched uranium means

A. Uranium that is very pure

B. Uranium in which the concentration of the isotope U-238 is more than in the naturally occuring uranium

C. Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium

D. None of the above

What is the correct answer?

4

Air escaping rapidly from a narrow orifice in an inflated tyre feels cool because

A. the speed with which it escapes cools it down

B. of the higher temperature of the surroundings

C. of sudden expansion causing loss of internal energy

D. there is no real fall in temperature

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

When we sweat, we feel comfortable under a fan because

A. the air circulated by the fan is cool

B. the fan produces convection currents of air

C. the air circulated by the fan quickens the evaporation of the moisture on our skin

D. the air takes away the heat from our body

What is the correct answer?

4

A lightning conductor installed in a building

A. does not allow the lightning to fall on the building at all

B. drives away the charged clouds

C. forces the lightning to fall on other buildings near that building

D. conducts the electric charges to the ground when lightning strikes the building

What is the correct answer?

4

Which of the following can produce electricity?

A. resistor

B. thermocouple

C. light bulb

D. neon tube

What is the correct answer?

4

The largest reserve of radioactive element which can be used in a nuclear reactor has been found in India, The name of the element is

A. Thorium

B. Uranium

C. Plutonium

D. Radium

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 rocket engine is motivated by jet propulsion which uses the famous

A. Kepler's Laws

B. Newtonian Third Law of Motion

C. Bernoulli's Principle

D. Law of Relativity

What is the correct answer?

4

The filament lamp is an example for

A. fluorescence

B. incandescence

C. both (a) and (b)

D. None of these

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

Credit for starting Space Science Research in India goes to

A. HJ Bhabha

B. SS Bhatnagar

C. V Sarabhai

D. CV Raman

What is the correct answer?

4

The ozone layer absorbs

A. Cosmic rays

B. Infrared rays

C. All radiations of light

D. Ultra violet rays coming from the sun

What is the correct answer?

4

A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point the rifle

A. at the lower elevation than the bird

B. at a higher elevation than the bird

C. in the same direction as the bird

D. vertically upwards

What is the correct answer?

4

A stationary elevated object has

A. kinetic energy

B. potential energy

C. momentum

D. both potential and kinetic energy

What is the correct answer?

4

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

What is the correct answer?

4

When we sweat, we feel comfortable under a fan because

A. the air circulated by the fan is cool

B. the fan produces convection currents of air

C. the air circulated by the fan quickens the evaporation of the moisture on our skin

D. the air takes away the heat from our body

What is the correct answer?

4

Mercury is used in a barometer because

A. its density being very high 13.6 g/cm3 the height of mercury column is conveniently small

B. at the ordinary temperature its vapour pressure is small

C. it is opaque and does not wet glass

D. All the above

What is the correct answer?

4

The heating element often used in an electric iron is

A. copper

B. tungsten

C. mica

D. nichrome

What is the correct answer?

4

Which physical quantity is measured in watts

A. power

B. kinetic energy

C. momentum

D. impulse

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

Which of the following is wrongly matched?

A. electric current - ampere

B. resistance - Ohm

C. electric power - volt

D. electric charge Coulomb

What is the correct answer?

4

Lightning is produced when

A. similar charges of electricity rush towards each other and then get repelled

B. clouds strike against impurities in air and the friction burns up these impurities

C. strong opposite charges in different clouds break down the resistance offered by the intervening air

D. water vapour produces electricity in the clouds

What is the correct answer?

4

The colour of the light which travels through glass with minimum speed is

A. red

B. violet

C. green

D. yellow