本题目来源于试卷: Physics Unit18: Electric Currents，类别为 通用国际物理
[单选题]
Consider two copper wires. 7tx,q dgsvoob) i;:)s dr kh63 jppsmak*g*/oa fl07 dr1* nk7x2 .febof n.e( One has twice the length and twice the cross-sectional area of 1pf.e(nx7 *m k/sfaok7d genpf*obl j0a2r* . the other. How do the resistances of these two wires compare?
A. Both wires have the same resistance.
B. The longer wire has twice the resistance of the shorter wire.
C. The longer wire has four times the resistance of the shorter wire.
D. none of the given answers
参考答案: A
本题详细解析:
暂无
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