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The voltages across various discs of suspension insulators having identical discs are different due to: 

(A) Surface leakage currents 

(B) Series capacitance of lines 

(C) Shunt capacitance to ground 

(D) Series and shunt capacitances

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The voltages across various discs of suspension insulators having identical discs are different due to: Shunt capacitance to ground 

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