The star nearest to the sun is
Proxima Centauri
Sirius
Aldebaran
Vega
Correct Answer :
A. Proxima Centauri
Related Questions
Moon has no atmosphere because
it has no population
it is quite far off
its surface is full of rocks
its gravity is not sufficient for any atmosphere to hold on to it
Out of the following which is an insulator?
Silver
Copper
Nichrome
Dry wood
The end product in the uranium disintegration series is
lead
zinc
carbon
tin
A hydraulic brake in an automobile uses
a fluid to transmit the braking force
the force applied by the driver
hydrogen gas and not any liquid
a vacuum brake
Sound waves In 'air travel faster if
frequency is higher
wavelength is smaller
pitch is smaller
air is warmer
The ozone layer absorbs
Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
On applying a constant force to a mass, It moves with a uniform
velocity
momentum
acceleration
angular velocity
The strength of an electromagnet can be increased by
increasing the length of the coiled wire
increasing current supply
increasing the size of the iron core
All the above
Photo-electric cells convert
electrical energy into light energy
light energy into electrical energy
light energy into heat energy
electrical energy into heat energy
The heat produced in a conductor due to the passage of a current through it is proportional to
the square of the current
the resistance of the conductor
the time for which the current flows
All the above
When ice just melts
there is no change in volume
there is no change in temperature
heat is given out
there is no change of state
Astigmatism, a structural defect of the eye, is due to
the eye lens being thin
the eye lens being thick
lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
the pupil being very small
Meteors
look like falling stars
are really pieces of rock or metal
burn up as they shoot through the air
All the above
The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation is
Hygrometer
Hypsometer
Hydrometer
Densimeter
Water has maximum density at
0° C
-15° C
4° C
15° C
Which of the following revolves round the nucleus in an atom?
protons
electrons
neutrons
positrons
We see the sun before it actually rises on the horizon. This is due to
refraction
reflection
total internal reflection
parallax
The nuclear model of atom was first visualised by
Rutherford
Neils Bohr
Albert Einstein
JJ Thompson
Skating on ice is possible because
the surface of ice is smooth
ice is cold
the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
the pressure on the ice due to skate raises its melting point
The speed of light is minimum while passing through
air
glass
vacuum
water
The filament used in the electric lamp is made of
nichrome
tungsten
copper
aluminium
The direction of heat flow between two objects depends on
their heat contents
their masses
their temperatures
whether they are in solid, liquid or gaseous state
Besides protons, the nucleus of an atom contains
electrons
neutrons
neutrons and electrons
electrons, neutrons and other particles
In the visible spectrum which colour has the shortest wavelength?
Red
Blue
Yellow
Violet
Metals are good conductors of heat because
they contain free electrons
their atoms are relatively far apart
their atoms collide frequently
they have reflecting surfaces
When a ship floats on water, the weight or water displaced is
an indeterminate quantity
equal to the weight of the ship
greater than the weight of the ship
less than the weight of the ship
The ozone layer absorbs
Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
The mixing up of two gases as a result of random motion of molecules is called
diffusion
effusion
vaporisation
sublimation
Every action has an equal and opposite reaction is Newton's law of Motion
first
second
third
fourth
When ice just melts
there is no change in volume
there is no change in temperature
heat is given out
there is no change of state