Wire a and Wire B Are Each Carrying the Same

Multiple Choice

Wire A and Wire B are each carrying the same current.If the diameter of Wire A is twice that of Wire B,how does the drift velocity v_dA in Wire A compare to that in in Wire B?

A) v_dA = v_dB
B) v_dA = 2 v_dB
C) v_dA = v_dB /2
D) v_dA = v_dB /4