Explore topic-wise MCQs in General Knowledge.

Isotopes of an element contain

Solar eclipse will take place when

Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?

Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit

Stars which appear single to the naked eye but are double when seen through a telescope are

ML²T^-2 is the dimensional formula for

Rainbow is due to

Inside an aeroplane, flying at a high altitude,

Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?

Out of the following pairs, which one does not have identical dimension?

Mercury is commonly used as a thermometric fluid rather than water because

Railway tracks are banked on curves

On a cold day when a room temperature is 15^oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15^oC, because

Optical fibre works on the

Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?

Intensity of sound at a point is ____ its distance from the source.

Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

Sound travels at the fastest speed in

Of the following properties of a wave, the one that is independent of the other is its

out of the following, which is not emitted by radioactive substance?

Sound waves in air are

Metals are good conductors of electricity because

Magnetism at the centre of a bar magnet is

It is more difficult to walk on a sandy road than on a concrete road because

Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

Moment of inertia is

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

Pick out the scalar quantity

Suitable impurities are added to a semiconductor depending on its use. This is done in order to

Stars twinkle because

Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

Mirage is due to

Light from the Sun reaches us in nearly

Stars appears to move from east to west because

Rectifiers are used to convert

Pa(Pascal) is the unit for

Planets do not twinkle because

Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?

Light year is a unit of

RADAR is used for

Sound of frequency below 20 Hz is called

On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because

On a rainy day, small oil films on water show brilliant colours. This is due to

Point A is at a lower electrical potential than point B. An electron between them on the line joining them will

Materials for rain-proof coats and tents owe their water-proof properties to

Radiocarbon dating technique is used to estimate the age of

Supersonic plane fly with the speed

Mach number is used in connection with the speed of

Radio telescopes are better than optical telescopes because