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A 132 kV line with 1.956 cm dia. conductors is built so that corona takes place if the line voltage exceeds 210 kV (peak).

A 132 kV line with 1.956 cm dia. conductors is built so that corona takes place if the line voltage exceeds 210 kV (peak). If the value of potential gradient at which ionization occurs can be taken as 30 kV per cm, find the spacing between the conductors

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