NEET Physics Current Electricity Questions Solved


The drift velocity of free electrons in a conductor is ‘v’ when a current ‘i’ is flowing in it. If both the radius and current are doubled, then drift velocity will be 

(1) v

(2) v2

(3) v4

(4) v8

(2) vd=ineπr2vdir2vv'=i1i2×r2r12

  v'=v2.

Difficulty Level:

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