本题目来源于试卷: Physics Unit20: Magnetism，类别为 通用国际物理
[单选题]
A circular wire loop of;a:eu 6qj)1(ulrdjmpv ,e3egx q;fggv6+m,(sl;yjn area $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?
A. $2.5 \times 10^{-5} \; m \cdot N$
B. $5.0 \times 10^{-5} \; m \cdot N$
C. $7.5 \times 10^{-5} \; m \cdot N$
D. $1.0 \times 10^{-4} \; m \cdot N$
参考答案: C
本题详细解析:
暂无
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