Physics > 2009 > 40
WASSCE
A wire of resistivity 4.40 × 10-5Ω cm has a cross sectional area of 7.50 × 10-4cm2. Calculate the length of this wire that will be required to make a 4.0Ω resistor
A.
82.50cm
B.
68.18cm
C.
15.90cm
D.
11.94cm
Answer: B
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