The star nearest to the sun is
Proxima Centauri
Sirius
Aldebaran
Vega
Correct Answer :
A. Proxima Centauri
Related Questions
The loudness of a sound is determined by
Frequency
Amplitude
Speed
Wavelength
Sun spots are
the mountains found on the surface of the Sun
the dark patches on the sun having less temperature than the normal sun's surface
ionized gas found near the solar surface
the magnetic storms on the surface of the Sun
During thunder storm you are travelling in a car. To protect yourself from the lightning you will have to
remain in the car
get out of the car and lie flat in the ground
abandon the car and take shelter under a nearby tree
touch the nearest electric pole
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
X
Y
X + Y
X Y
The planet with the reddish tinge is
Jupiter
Mars
Mercury
Saturn
The numerical reading of the Fahrenheit thermometer of a given temperature
is proportional to that of the Celsius thermometer
is always greater than that of the Celsius thermometer
is always less than that of the Celsius thermometer
may be greater than or less than or equal to that of the Celsius thermometer
The enormous energy released in nuclear and thermonuclear reactions is due to conversion of
chemical energy into heat energy
mechanical energy into heat energy
protons into neutrons
mass into energy according to Einstein's equation
Every action has an equal and opposite reaction is Newton's law of Motion
first
second
third
fourth
Railway tracks are banked on curves so that
the necessary centrifugal force may be obtained from the horizontal component of the weight of the train
the frictional force between the track and the wheels is avoided
the necessary centripetal force may be derived from the horizontal component of the weight of the train
None of these
When light passes from air to glass, its velocity in glass
increases
decreases
remains unchanged
first decreases then increases
No current will flow between two charged bodies if they have the same
resistance
charge
potential
charge/potential ratio
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
X
Y
X + Y
X Y
A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?
conduction and convection only
conduction and radiation only
convection and radiation only
conduction, convection and radiation
Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because
both walls are silvered on the vacuum side
there is vacuum between the double walls
the cork is a poor conductor of heat
of all the above
The leader of the team who succeeded in constructing the first nuclear reactor (an atomic pile) in the world was
Albert Einstein
Enrico Fermi
HJ Bhabha
Sir Isaac Newton
A light year means
a unit of time
a unit of length
a year of no consequence
illumination throughout the year
The image of an object formed on the retina of the eye is
virtual and upright
virtual and inverted
real and inverted
real and upright
Which of the following can produce electricity?
resistor
thermocouple
light bulb
neon tube
The velocity required to place a vehicle in orbit round the moon is _________ that required to place it in orbit round the earth.
less than
greater than
equal to
greater than or equal to
The barometer was invented by
Michael Faraday
Torricelli
Thomas Alva Edison
Benjamin Franklin
The ozone layer absorbs
Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
A pressure gauge for fluids is called
a hydrometer
a manometer
a lactometer
an anemometer
The instrument used to measure the strength of electric current at a point is
Ammeter
Altimeter
Adrinometer
Anemometer
The line on earth's surface passing through the places having zero dip is called the magnetic equator. This passes through
Thumba
Delhi
Mumbai
Sriharikota
When light travels from one medium to another there is a change in its
velocity
wavelength
frequency
Both (a) and (b) above
The temperature, surface features, length of days and nights of a planet depend on
its atmosphere
its distance from the sun
its rotation
All the above
When a steel ball is placed on the surface of mercury, it does not sink because
of the surface tension of mercury
mercury is a semi-solid
of the high viscosity of mercury
the density of mercury is greater than that of steel
Out of the following which element has the longest half-life period?
Radium
Radon
Uranium-238
Plutonium
Which of the following rays has the highest penetrative power?
a -rays
� -rays
? -rays
X-rays
The principle of equivalence of mass and energy was established by
Dalton
Rutherford
Einstein
Planck