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An electron of mass m, charge e falls th...

An electron of mass m, charge e falls through a distance h metre in a uniform electric field E. Then time of fall

A

`t=sqrt((2hm)/(eE))`

B

`t=(2hm)/(eE)`

C

`t=sqrt((2eE)/(hm))`

D

`t=(2eE)/(hm)`

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