The image formed by a plane mirror is
of the same size as the object
at the same distance behind the mirror as the object is in front of it
virtual and laterally inverted
All the above
Correct Answer :
D. All the above
Related Questions
Which of the following is fissionable?
U-234
U-235
U-238
Both (b) and (c)
One finds it more difficult to walk on ice than on a concrete road because
there is more friction on ice than on concrete surface
ice is soft and spongy while concrete is hard
the friction between ice and the feet is less than that between the concrete and the feet
None of them
The device used to record the sound is
a microphone
a headphone
a phonograph
an amplifier
Acoustics' la a branch or study dealing with
historical sites
architecture
sound
trigonometry
Rays from the headlight of a motor car are rendered parallel by suitably using
a convex mirror behind it
a concave lens behind it
a concave mirror in front of it
a concave mirror behind it
In a concert hall reverberation is controlled by
reduction of seating capacity in the hall
increase of sound intensity in the hall
lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
by opening the doors and windows of concert hall
The completely dark portion of a shadow of an object is known as
umbra
penumbra
image
black portion of light
The characteristics of a musical note are
loudness
pitch
quality or timbre
All the above
The distance between two bodies is halved. Now the force of attraction between them will be
half
one fourth
four times
two times
The method used to separate aluminium from a alumina is
electroplating
electrotyping
electrolysis
distillation
If a body is taken from the earth to the moon
both its mass and weight will be different
its mass will be different but the weight will remain the same
its mass and weight will both remain unchanged
its mass will remain the same but weight will be different
A nuclear reactor is said to have become 'critical' when
it stops due to malfunctioning
it starts emitting dangerous radioactive radiations
it is shut down to avoid explosion
it is ready to produce controlled energy
The colour of a star is an indication of its
distance from the earth
age
temperature
size
Compared to the atomic bomb, the destructive power of a hydrogen bomb is
greater
less
equal
can't be determined
Which of the following sets of elementary particles have nearly equal masses?
Neutron and Proton
Electron and Proton
Neutron and Electron
Proton, Neutron and Electron
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
When are temperature resistance
increases
decreases
remains the same
first increases then decreases
The unit of heat energy is
watt
degree
joule
erg
One can be recognised by his voice alone due to the factor of
quality
amplitude
pitch
loudness
The resistance of a wire depends on
the material of the wire
the length of the wire
the cross section of the wire
All the above
In a dynamo
mechanical energy is converted to light energy
mechanical energy is converted to heat energy
mechanical energy is converted to electrical energy
electrical energy is converted to mechanical energy
When a body Is taken to the poles from the equator, Its weight becomes
greater
less
the same
None of these
Sound waves in air are
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
Which of the following has the highest refractive index?
Crown glass
Water
Flint glass
Diamond
Solar radiation is preferred to other sources of energy because
it is practically inexhaustible
it is the cheapest form of energy
it does not cause pollution
All of the above
The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by
Irene Curie
W Bothe and H Becker
James Chadwick
Jean Joliot
Which of the following sets of elementary particles have nearly equal masses?
Neutron and Proton
Electron and Proton
Neutron and Electron
Proton, Neutron and Electron
Under similar conditions of temperature and pressure, the velocity of sound is maximum in
helium
argon
hydrogen
oxygen
The difference between planets and stars is
planets do not have light of their own whereas stars shine by their own light
planets do not twinkle like stars
planets are much smaller than stars
All the above
The Solar System lies near the edge of a galaxy known as
The Milky Way
Radio Galaxy
Andromeda Nebula
Magellanic Clouds