Fields D.4 Electromagnetic Induction (id: ac2151d8a)

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

[单选题]
There are four conductinxm3uslj* 90vsr5 q6 t v1(xoxrg coils K, L, M, and N. Each qohk/91 2xogp1l;qbnloop moves from a region where the magnetic field is zero into a uniform magnetic field, inducing either a clockwise or counterclockwise current in the loops. The speed of each coil is given, and the dimensions can be seen from theo1 hq/2x1plk bqng9o; grid.



Which statement(s) are correct about the instant when the loops enter the magnetic field?
I. The magnitude of induced emf in the coil K equals the emf in coil M.
II. The magnitude of induced emf in coil M equals the emf coil N.
III. The induced current in coil K is in the opposite direction to the induced current in coil L.

A. $I$ only
B. $I$ and $II$ only
C. $II$ and $III$ only
D. $I$, $II$ and $III$


参考答案:  B


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