Current Electricity | Drift Velocity and Relaxation Time All the best! 1. Drift velocity vd varies with the intensity of electric field as per the relation- (A) vd ∝ E (B) vd ∝ 1/E (C) vd = constant (D) vd ∝ E2 Option (A) Option (B) Option (C) Option (D) None 2. If the potential difference V applied across a conductor is increased to 2V with its temperature kept constant, the drift velocity of the free electrons in a conductor will- remain the same become half of its previous value be double of its initial value become zero None 3. Electrons drift with speed vd in a conductor with potential difference V across its ends. If V is reduced to V/2, their drift speed will become- (A) vd / 2 (B) vd (C) 2vd (D) 4vd Option (A) Option (B) Option (C) Option (D) None 4. The direction of drift velocity of electrons in a conducting wire is- opposite to the direction of electric field in the direction of electric field perpendicular to the direction of electric field at an acute angle with the direction of electric field None 5. In the absence of electric field, possible path of free electrons inside a conductor between consecutive collision is- hyperbolic straight line parabolic elliptical None 6. Which of the following characteristics of electrons determines the current in a conductor? drift velocity alone thermal velocity alone both drift velocity and thermal velocity neither drift nor thermal velocity None 1 out of 6 Time's up
