Fields D.3 Motion in Electromagnetic Fields (id: 1a07445d8)

本题目来源于试卷: Fields D.3 Motion in Electromagnetic Fields，类别为 IB物理学

[单选题]

A conductor carrying electric current out of the plane of the paper is placed between two magnets as shown in the diagram.

At which location is the magnitude of the resultant magnetic field strength largest due to the conductor and the magnets?

A.
B.
C.
D.


参考答案:  A


本题详细解析:
Explanation:

The magnetic field between the magnets is from N to S, therefore towards the left.

The magnetic field of the current carrying conductor is towards the left at A, towards the right at B (right-hand rule)

At B and C, the two fields will be perpendicular to each other.

At D they will be opposite to each other and therefore partially cancel out.

Since they are in the same direction at A, the resultant will be greatest at A.

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