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Air is a non-conductor of electricity, but above certain threshold field $E_{th}$, air becomes ionized and can conduct electricity. This phenomenon is called leakage of charge. For a conducting sphere of radius $R = 10\; cm$, it is known that $E_{th} = 10^8 V/m.$ The maximum potential to which the conducting sphere can be charged in air without the possibility of leakage is

1 Answer

$(D) 10^{7} \;V$
Hence D is the correct answer.
answered Jun 11, 2014 by meena.p

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