Charge passing through a conductor of cross-section area A=0.3 ~m ^2 is given by q=3 t^2+5 t+2 in coulomb, where t is in second. What is the value of drift velocity at t=2 ~s ? (Given, n=2 10²⁵ / m ^3 )

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Correct answer: B. 1.77 10⁻⁵ ~m / s

A=0.3 ~m ^2n=2 10²⁵ / m ^3q=3 t^2+5 t+2i= d q d t =6 t+5=17i=n e A v_d Drift velocity, v_d= i n e A = 17 2 10²⁵ 1.6 10⁻¹⁹ 0.3 = 17 0.96 10^6 =1.77 10⁻⁵ ~m / s

Charge passing through a conductor of cross-section area A=0.3 ~m ^2 is given by q=3 t^2+5 t+2 in coulomb, where t is in second. What is the value of drift velocity at t=2 ~s ? (Given, n=2 10²⁵ / m ^3 )

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