When current I flows through a wire, the drift velocity of the electrons is v. When current 21 flows through another wire of the same material having double the length and area of cross-section, the drift velocity of the electrons will be-
A. (frac < v >< 4 >)
B. (frac < v >< 2 >)
C. v
D. 2 v
Answer:C
When current I flows through a wire, the drift velocity of the electrons is v. When current 21 flows through another wire of the same material having double the length and area of cross-section, the drift velocity of the electrons will be-
A. (frac < v >< 4 >) B. (frac < v >< 2 >) C. v D. 2 v