Natural radioactivity was discovered by
Natural radioactivity was discovered by
On a rainy day, small oil films on water show brilliant colours. This is due to
On a rainy day, small oil films on water show brilliant colours. This is due to
ML2T-2 is the dimensional formula for
ML2T-2 is the dimensional formula for
Intensity of sound at a point is ____ its distance from the source.
Intensity of sound at a point is ____ its distance from the source.
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
Identify the vector quantity from the following
Identify the vector quantity from the following
One watt-hour is equivalent to
One watt-hour is equivalent to
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
- I.Diffusion
- II.Refraction
- III.Internal reflection
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
- I.Diffusion
- II.Refraction
- III.Internal reflection
Light travels at the fastest speed in:
Light travels at the fastest speed in:
Suitable impurities are added to a semiconductor depending on its use. This is done in order to
Suitable impurities are added to a semiconductor depending on its use. This is done in order to
Railway tracks are banked on curves
Railway tracks are banked on curves
Stars which appear single to the naked eye but are double when seen through a telescope are
Stars which appear single to the naked eye but are double when seen through a telescope are
One nanometer is equal to
One nanometer is equal to
Out of the following, which is not emitted by radioactive substance?
Out of the following, which is not emitted by radioactive substance?
Supersonic plane fly with the speed
Supersonic plane fly with the speed
Isotopes of an element contain
Isotopes of an element contain
Siphon will fail to work if:
Siphon will fail to work if:
One should not connect a number of electrical appliances to the same power socket because
One should not connect a number of electrical appliances to the same power socket because
Stars appears to move from east to west because
Stars appears to move from east to west because
Light from the Sun reaches us in nearly
Light from the Sun reaches us in nearly
Sound travels at the fastest speed in
Sound travels at the fastest speed in
Intensity of sound has
Intensity of sound has
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
It is more difficult to walk on a sandy road than on a concrete road because
It is more difficult to walk on a sandy road than on a concrete road because
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
Minimum number of unequal vectors which can give zero resultant are
Minimum number of unequal vectors which can give zero resultant are
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
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 clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
Magnetism at the centre of a bar magnet is
Magnetism at the centre of a bar magnet is
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
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
Pa(Pascal) is the unit for
Pa(Pascal) is the unit for
Sound waves in air are
Sound waves in air are
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
On a stationary sail boat, air is blown from a fan attached to the boat. The boat
On a stationary sail boat, air is blown from a fan attached to the boat. The boat
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:
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:
Sound of frequency below 20 Hz is called
Sound of frequency below 20 Hz is called
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Oil raise up the wick in a lamp. The principle involves
Oil raise up the wick in a lamp. The principle involves
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
The absorption of ink by blotting paper involves:
The absorption of ink by blotting paper involves:
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
Which of the following terms is not used in the field of physics?
Which of the following terms is not used in the field of physics?
Superconductors are substances which
Superconductors are substances which
One thousand microns is equal to
One thousand microns is equal to
Which tube used to produce X-ray?
Which tube used to produce X-ray?
Pick out the scalar quantity
Pick out the scalar quantity
Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?
Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?
Nuclear sizes are expressed in a unit named
Nuclear sizes are expressed in a unit named
Out of the following pairs, which one does not have identical dimension?
Out of the following pairs, which one does not have identical dimension?
It takes much longer to cook food in the hills than in the plains, because
It takes much longer to cook food in the hills than in the plains, because
Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
It is easier to roll a barrel full of coal tar than to pull it because
It is easier to roll a barrel full of coal tar than to pull it because
Optical fibre works on the
Optical fibre works on the
Moment of inertia is:
Moment of inertia is:
Mercury is commonly used as a thermometric fluid rather than water because
Mercury is commonly used as a thermometric fluid rather than water because
Light year is a unit of
Light year is a unit of
Radiocarbon is produced in the atmosphere as a result of
Radiocarbon is produced in the atmosphere as a result of
Of the following properties of a wave, the one that is independent of the other is its
Of the following properties of a wave, the one that is independent of the other is its
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?
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?
Radio telescopes are better than optical telescopes because
Radio telescopes are better than optical telescopes because
Rectifiers are used to convert:
Rectifiers are used to convert:
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
Stars twinkle because
Stars twinkle because
Radiocarbon dating technique is used to estimate the age of
Radiocarbon dating technique is used to estimate the age of
Rainbow is due to
Rainbow is due to
Inside an aeroplane, flying at a high altitude,
Inside an aeroplane, flying at a high altitude,
RADAR is used for:
RADAR is used for:
Lux is the SI unit of
Lux is the SI unit of
Solar eclipse will take place when
Solar eclipse will take place when
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
Large astronomical telescopes always use as objective
Large astronomical telescopes always use as objective
Mirage is due to:
Mirage is due to:
Materials for rain-proof coats and tents owe their water-proof properties to
Materials for rain-proof coats and tents owe their water-proof properties to
Mach number is used in connection with the speed of
Mach number is used in connection with the speed of
Metals are good conductors of electricity because:
Metals are good conductors of electricity because:
Planets do not twinkle because
Planets do not twinkle because
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
Mica is used in electrical appliances such as electric iron because mica is
Mica is used in electrical appliances such as electric iron because mica is
In which of the following industries is mica as a raw material?
In which of the following industries is mica as a raw material?
