In a photoelectric cell, current stops w...

In a photoelectric cell, current stops when a negative potential of 0.5v is given to the collector w.r.t. emitter. The maximum K.E. of emitted electron is

`0.8xx10^(-19)` joule

`0.8xx10^(-19)` erg

`0.5` joule

0.5 erg

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