An isolated radioactive source in the form a metal sphere of radius 1 mm undergoes beta -ray at a constant rate of 6.25 xx 10^(10) //sec . Assuming 70% of the emitted beta - particles escape from the source, time after which potential of the sphere rises by 1 V is

An isolated radioactive source in the form a metal sphere of radius 1

1.	An isolated radioactive source in the form a metal sphere of radius 1 mm undergoes beta -ray at a constant rate of 6.25 xx 10^(10) //sec . Assuming 70% of the emitted beta - particles escape from the source, time after which potential of the sphere rises by 1 V is
Answer» `15.5 UMS` `20 muS` `25 muS` `10 muS` ANSWER :A

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An isolated radioactive source in the form a metal sphere of radius 1 mm undergoes beta -ray at a constant rate of 6.25 xx 10^(10) //sec . Assuming 70% of the emitted beta - particles escape from the source, time after which potential of the sphere rises by 1 V is

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