問題詳情

14. A solenoid with N turns has a length I and a redius r. For what current will the energydensity within the solenoid be u?
(A)


(B)


(C)


(D)


(E) nome of the above. 

參考答案

答案：E
難度：計算中-1
書單：沒有書單，新增