The Heating Element of a Toaster Is A $5.4 - \mathrm { m }$

question 7

Multiple Choice

The heating element of a toaster is a $5.4 - \mathrm { m }$ length of nichrome wire of diameter $0.48 \mathrm {~mm}$ . The resistivity of nichrome at the operating temperature of the toaster is $1.3 \times 10 ^ { - 6 } \Omega \cdot \mathrm { m }$ . The toaster is designed to operate at a voltage of $120 \mathrm {~V}$ . How much power does it draw in normal operation?

• A) \(380 \mathrm {~W}\)
• B) \(360 \mathrm {~W}\)
• C) \(410 \mathrm {~W}\)
• D) \(400 \mathrm {~W}\)
• E) \(370 \mathrm {~W}\)