both pieces will lose their magnetism
one piece will have North Pole on both ends and the other South Pole on its both ends
each will remain a magnet with North Pole at one end and South Pole at the other
the longer piece will behave as a bar magnet while the smaller will have no magnetism at all
C. each will remain a magnet with North Pole at one end and South Pole at the other
X
Y
X + Y
X Y
absorbs
refracts
reflects
scatters
the ball will travel towards the centre of the circle and fall down
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
it will fall down at the same place where the string breaks
None of these
increase
decrease
remain unaffected
have its shape changed
heat waves
sound waves
radio waves
light waves
Uranium that is very pure
Uranium in which the concentration of the isotope U-238 is more than in the naturally occuring uranium
Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium
None of the above
the speed with which it escapes cools it down
of the higher temperature of the surroundings
of sudden expansion causing loss of internal energy
there is no real fall in temperature
its momentum is halved
its kinetic energy is halved
its acceleration is halved
its potential energy is halved
increasing the length of the coiled wire
increasing current supply
increasing the size of the iron core
All the above
the air circulated by the fan is cool
the fan produces convection currents of air
the air circulated by the fan quickens the evaporation of the moisture on our skin
the air takes away the heat from our body
does not allow the lightning to fall on the building at all
drives away the charged clouds
forces the lightning to fall on other buildings near that building
conducts the electric charges to the ground when lightning strikes the building
resistor
thermocouple
light bulb
neon tube
Thorium
Uranium
Plutonium
Radium
50 kg
45 kg
zero
150 kg
Kepler's Laws
Newtonian Third Law of Motion
Bernoulli's Principle
Law of Relativity
fluorescence
incandescence
both (a) and (b)
None of these
will increase
will decrease
does not change
varies with the increase of depth of the immersion of the iron piece
HJ Bhabha
SS Bhatnagar
V Sarabhai
CV Raman
Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
at the lower elevation than the bird
at a higher elevation than the bird
in the same direction as the bird
vertically upwards
kinetic energy
potential energy
momentum
both potential and kinetic energy
is real
is virtual
can be obtained on a screen
is slightly bigger than the object
the air circulated by the fan is cool
the fan produces convection currents of air
the air circulated by the fan quickens the evaporation of the moisture on our skin
the air takes away the heat from our body
its density being very high 13.6 g/cm3 the height of mercury column is conveniently small
at the ordinary temperature its vapour pressure is small
it is opaque and does not wet glass
All the above
copper
tungsten
mica
nichrome
power
kinetic energy
momentum
impulse
capillarity
cohesion
adhesion
viscosity
electric current - ampere
resistance - Ohm
electric power - volt
electric charge Coulomb
similar charges of electricity rush towards each other and then get repelled
clouds strike against impurities in air and the friction burns up these impurities
strong opposite charges in different clouds break down the resistance offered by the intervening air
water vapour produces electricity in the clouds
red
violet
green
yellow