The frequency of an ultrasonic wave is
the same as that of an audible sound
above the audible range
below the audible range
None of the above
Correct Answer :
B. above the audible range
Related Questions
The method used to separate aluminium from a alumina is
electroplating
electrotyping
electrolysis
distillation
A body has fallen from a height. Just before touching the pound it has
lost all its potential energy and gained an equivalent amount of kinetic energy
gained potential energy and lost kinetic energy
gained kinetic energy as well as potential energy
lost kinetic energy as well as potential energy
The ballistic missile, Agni 11, tested by India has a maximum range of
1000 km
1500 km
2000 km
500 km
Which force is used when milk is churned to separate cream?
cohesive
centrifugal
frictional
gravitational
Which of the following is fissionable?
U-234
U-235
U-238
Both (b) and (c)
Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
the pores in the pot are closed
rain water stops oozing out from the pores
the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
surface of the pot becomes damp
In compact porous soil, the rising of the water is due to
capillarity
cohesion
adhesion
viscosity
For viewing objects placed at a higher level from a position at a lower level, the instrument used' Is known aa
telescope
spectrometer
microscope
periscope
The spectrum of white light can be studied by
a microscope
a telescope
a stereoscope
a spectroscope
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 rate of cooling of a hot body depends on
the nature of the radiating surface
area of the radiating surface
temperature difference between the body and the surroundings
All the above
Like magnetic poles
attract each other
repel each other
neither attract nor repel
attract or repel depending upon the conditions
The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation is
Hygrometer
Hypsometer
Hydrometer
Densimeter
To get 5 images of a single object one should have two plane mirrors inclined at an angle of
72°
60°
36°
90°
The planet that moves fastest around the sun is
Mars
Venus
Earth
Mercury
In a hydraulic pressure
force on each square centimetre of the small piston is less than the force on each square centimetre of the large piston
the distance the small piston moves is equal to the distance the large piston moves
applied pressure is equally transmitted throughout the liquid in all directions
force acting on small piston is equal to the force acting on large piston
Out of the following, name the fluorescent substance.
quinine sulphate solution
paraffin oil
fluorescein solutions
All the above
A bar magnet tied in the middle with a thread is suspended at the South Pole of the earth. The magnet will be in
a horizontal position
a nearly vertical position with its South Pole downwards
a nearly vertical position with its North Pole downwards
a slanting position
The device for tracking and locating the position of a moving object in space is called
Space ship
Lunar module
Radar
Rocket
The motion .of the pendulum of a wall clock is an example of
linear motion
vibratory motion
rotational motion
None of the above
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
The image of an object formed in a plane mirror
is real
is virtual
can be obtained on a screen
is slightly bigger than the object
Commonly used safety fuse wire is made of
Tin
Lead
Nickel
An alloy of tin and lead
The escape velocity of a satellite projected from the surface of the earth is independent of
the mass of earth
the mass of the satellite
the radius of the earth
gravitation of the earth
The planet that is known as earth's twin is
Mercury
Venus
Moon
Mars
An astronomical unit of distance is
a kilometre
light year
the average distance from the earth to the sun
None of the above
The Cact that the compass needle does not point true north was observed first by
Sir Isaac Newton
Columbus
Archimedes
Thomas Alva Edison
The stars that shine brightly then dimly and then brightly are known as
meteors
binaries
variable stars
bright stars
When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light ray diminishes alter a few reflections. This is because of
poor reflection from the mirrors
scattering of light from the mirrors
absorption of some light by the mirrors
absorption of light by the atmosphere
The principle of equivalence of mass and energy was established by
Dalton
Rutherford
Einstein
Planck