Fields D.4 Electromagnetic Induction (id: 9fed0cec5)

本题目来源于试卷: Fields D.4 Electromagnetic Induction，类别为 IB物理学

[单选题]
X, Y and Z are three pl6b5zuo,o3;xue rq , -av 4mvxpanq b,w1iyxev/er7 7dp3ts/szl * ;0icj e coils. They are parallel to each other and share the same central axis. There is a constant currentzjl0 dcq bit,r;*7/3/ype 1ewxs i7vs in the fixed positioned coil Y.


Both coils X and Z are moved to the right. What are the directions of the induced currents in coil X and coil Z relative to coil Y?

A. Coil X is Same direction as in coil Y ; Coil Z is Same direction as in coil Y
B. Coil X is Opposite direction to coil Y ; Coil Z is Same direction as in coil Y
C. Coil X is Same direction as in coil Y ; Coil Z is Opposite direction to coil Y
D. Coil X is Opposite direction to coil Y ; Coil Z is Opposite direction to coil Y


参考答案:  B


本题详细解析:
Explanation:

According to Lenz' law, emf is induced such that the induced current is a direction to oppose the change in flux. Coil X is approaching coil Y, and magnetic flux increases; the induced current will be in the opposite direction to create the opposing magnetic field. Conversely, coil Z recedes from coil Y, and magnetic flux decreases; that is, the induced current will be in the same direction to create a magnetic field in the same direction.

微信扫一扫，分享更方便