The heater element of a particular 120-V toaster is a 8.9-m length of nichrome wire, whose diameter is 0.86 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10^-6 Ω ∙ m. If the toaster is operated at a voltage of 120 V, how much power does it draw?

Question

Quizplus · Accepted Answer

The resistance of the wire can be calculated using the formula R = ρL/A, where ρ is the resistivity, L is the length, and A is the cross-sectional area. The power can then be calculated using P = V²/R. Substituting the given values, the power drawn is approximately 720 W.

The Heater Element of a Particular 120-V Toaster Is a 8.9-M