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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 coluomb, where t is second. What is the value of drift velocity at t = 2 s ? (Given, `n=2xx10^(25)//m^(3)`)

A

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

B

`1.77xx10^(-5)m//s`

C

`2.08xx10^(-5)m//s`

D

`0.57xx10^(5)m//s`

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The correct Answer is:
B
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