A wire of 5Ω resistance is drawn out so that its new length is two times the original length. If the resistivity of the wire remains the same and the cross-sectional area is halved, the new resistance is?

by | Nov 14 | Physics JAMB | 0 comments

A. 40Ω
B. 20Ω
C. 10Ω
D. 5Ω

Correct Answer:

Option B – 20Ω

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