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Answer Posted / nimal prashanth
when the aircraft is in the air, to protect the plane from
a lightning strike, aircraft earthing is done.
the whole of the outer body is made up of a good conducror
of electricity(alluminium) and this outer body is insulated
from the other parts of the plane. when the lightning
strikes, the whole body of the plane acts as a conductor
and the lightning continues even after the length of the
plane and also may reach the earth. The inner surface of
the plane and thus the passengers are not affected by the
strike
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