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Charge passing through a conductor of cross-section area `A=0.3 m^2` is given by `q=3t^2+5t+2` in coulomb, where t is in second. What is the value of drift velocity at t=2 s ?(n= 2××10^25/m^3)

A

`0.77 xx10^(-5) m//s`

B

`1.77 xx 10^(-5) m//s`

C

`2.08 xx 10^(5) m//s`

D

`0.57 xx 10^(-5) m//s`

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The correct Answer is:
B
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