Answer / subhash kumar

When the potential difference is gradually increase across two conductor, than at one stage the atmospheric air surrounding the conductor is subjected to electro static stree.
And if the potential difference still further at one stage arrives when a faint luminous glow of Violet colour appears together with a hissing noise.
The whole phenomenon hissing noise the Violet glow and production of ozone gas is known as corona... ..

Answer / rishan chanaka

Due to electronics pass on the surface of the high voltage transmission line conductor becomes a conductive and bluish due to dielectric breakdown of air hissing noise come from surrounding, its called corona

Answer / krunal

Corona is a discharge caused by electrical overstress

Answer / vijay

coronais effect of high voltage when near a conducter
surface air work as a coducter,and noise as hissing and
developed the smale as ozone

Answer / mural i

WHEN THE VOLTAGE IS HIGH AND the distance between two
conductors is greater thAN THEIR DIA,THEN THE VOLTAGE
IONISES THE SURROUNDING AIR RESULTING IN A VIOLET GLOW WITH
A HISSING NOISE CALLAED CORONA

Answer / sonamoni

The corona is made up of loops of hot gas that arch high
above the sun's surface.

Answer / aruna

the phenomenon of violet glow, hissing noise & the
production of ozone gas in a overhead transmission line is
known as the corona effect

Answer / raviteja

corona is self sustained electric discharge in which the
field intensified ionization is localized only a portion of
the distance between electrodes.

Answer / zaighum ali malik

When the distance between two conductors is greater then
their dia and we change potential difference a stage will
come when we see blue flame and hissing sound (Humming) is
called corona effect.

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