A Ribbon of Nichrome (Resistivity = 1 $\varOmega$ ·M)with a Rectangular Cross Sectional Area of (0

question 70

Multiple Choice

A ribbon of nichrome (resistivity = 1.00 * 10^-6 $\varOmega$ ·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 $\varOmega$ ?

• A)1.24 cm
• B)2.79 cm
• C)12.4 cm
• D)21.9 cm
• E)37.5 cm

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