The nuclear model of atom was first visualised by
Rutherford
Neils Bohr
Albert Einstein
JJ Thompson
Correct Answer :
A. Rutherford
Related Questions
Every action has an equal and opposite reaction is Newton's law of Motion
first
second
third
fourth
The atmosphere gets heated up mainly by
direct sun's rays
radiation from earth's surface
radiogenic heat (resulting from radioactive decay)
cosmic rays coming from space
A car parked in the sun with its windows closed gets terribly hot inside. This is due to
the heat emitted by the engine
the greenhouse effect
the good conducting power of the metal body
the double layered wind shield
The number of galaxies that are visible without telescope on clear dark nights and away from bright lights is
one
two
three
infinite
The coil of an electric heater is made of
Platinum
Tungsten
Nichrome
Copper
The motion .of the pendulum of a wall clock is an example of
linear motion
vibratory motion
rotational motion
None of the above
The pressure of air at high altitude is less than the atmospheric pressure at the sea level. Hence the boning point of water at a hill top
is more than at sea level
is equal to that sea level
is less than at sea level
depends on the surrounding temperature
Besides protons, the nucleus of an atom contains
electrons
neutrons
neutrons and electrons
electrons, neutrons and other particles
When the disturbed electrons of an exited atom transfer back into lower energy levels they emit energy in the form of electromagnetic wave pulses called
neutrons
electrons
phonons
photons
Electron-volt is a unit of
power
velocity
energy widely used in nuclear physics
number of electrons
An ohm is a unit of
potential difference
resistance
current
All the above
If an object is placed between two parallel plane mirrors, the number of images formed will be
1
infinite
0
4
If you want a sound proof room, the walls should be
able to refract the sound
good absorbers of sound
good reflectors of sound
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
Which of the following has the highest refractive index?
Crown glass
Water
Flint glass
Diamond
A device used in a ship for the purpose of measuring the depth of the sea is
an altimeter
a fathometer
a hydrometer
a sonometer
The motion .of the pendulum of a wall clock is an example of
linear motion
vibratory motion
rotational motion
None of the above
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
The study of astronomy include a
astrology
astrophysics
astrometry
Both (b) and (c) above
Among the following the most suitable material for the core of an electro-magnet is
steel
wood
soft iron
copper
Alternating Current (AC) is more advantageous than direct current because
it can be transmitted easily and efficiently
Alternating Current (AC) loses the least amount of energy when transmitted at high voltages
Alternating Current (AC) voltage can be easily increased or decreased
all the above
At temperature near OK, (zero kelvin) metals such as lead and tin become
insulators
semiconductors
superconductors
condenser
To concentrate light on the defective teeth, the dentists use
convex mirrors
concave mirrors
convex lens
concave lens
The function of a ruse wire is
to stabilise the voltage
to decrease the current supply
to increase the current supply
to prevent an unduly high current from passing through a circuit
When a body Is taken to the poles from the equator, Its weight becomes
greater
less
the same
None of these
Which of the following can produce electricity?
resistor
thermocouple
light bulb
neon tube
An astronomical unit of distance is
a kilometre
light year
the average distance from the earth to the sun
None of the above
The largest planet in the solar system is
Neptune
Uranus
Jupiter
Saturn
A permanent magnet may be demagnetised by
placing it inside a solenoid through which an alternating current is flowing
heating the magnet to redness and then allowing it to cool
dropping it several times or hammering it while lying east-west
All the above
Photoelectric cell is a device which converts
light energy into electrical energy
electrical energy into light energy
magnetic energy into electrical energy
electrical energy into mechanical energy