A spark passes in air when the potential gradient at the surface of charged conductor is 4xx10^(6) Vm^(-1). What must be the radiusof an insulated metal sphere which can be chargedtoa potentialof 4xx10^(6) V before sparking into air ?

A spark passes in air when the potential gradient at the surface of ch

1.	A spark passes in air when the potential gradient at the surface of charged conductor is 4xx10^(6) Vm^(-1). What must be the radiusof an insulated metal sphere which can be chargedtoa potentialof 4xx10^(6) V before sparking into air ?
Answer» SOLUTION :As POTENTIAL GRADIENT`(dV)/(dr) = 4XX10^(6)V`, Thereforedr = 1m

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A spark passes in air when the potential gradient at the surface of charged conductor is 4xx10^(6) Vm^(-1). What must be the radiusof an insulated metal sphere which can be chargedtoa potentialof 4xx10^(6) V before sparking into air ?

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