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An electron is accelerated to a potentia...

An electron is accelerated to a potential of 200 V and acquires a velocity of `8.4xx10^(6)ms^(-1)`. The e/m is:

A

`1.76xx10^(9)C//kg`

B

`1.76xx10^(10)C//kg`

C

`1.76xx10^(11)C//kg`

D

`1.76xx10^(12)C//kg`

Text Solution

Verified by Experts

The correct Answer is:
C
`e//m=(v^(2))/(2V)=(8*4xx10^(6)xx8*4xx10^(6))/(2xx200)`
`=1*764xx10^(11)xxC kg^(-1)`
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