Physics > 2005 > 39
WASSCE
A constantan wire has a cross sectional area of 4 × 10-8m2 and a resistivity of 1.1 × 10-6Ωm. If a resistor of resistance 11Ω is to made from this wire, calculate the length of the wire required.
A.
0.4m
B.
0.8m
C.
2.5m
D.
5.0m
Answer: A
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