Wire a and Wire B Are Each Carrying the Same

question 46

Multiple Choice

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

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

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