A ribbon of nichrome (resistivity = 1.00 * 10-6 ·m) with a rectangular cross sectional area of (0.25 mm * 1.00 mm) will be used as a heating element in a toaster.How long should this ribbon be,if the total resistance is intended to be 1.5 ?
A) 1.24 cm
B) 2.79 cm
C) 12.4 cm
D) 21.9 cm
E) 37.5 cm
Correct Answer:
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