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A hot filamnet liberates an electron ...

A hot filamnet liberates an electron with zero intital velocity . The andoe potential is 1200 V. The speed of the electron when is strikes the anode is .

A

`2.5 xx 10^(8) ms^(-1)`

B

`1.5 xx 10^(5) ms^(-1)`

C

`2.5 xx 10^(6) ms^(-1)`

D

`2.1 xx 10^(7) ms^(-1)`

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