Question

The heater element of a particular 120-V toaster is a 8.5-m length of nichrome wire, whose diameter is 0.61 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3x10^-6 ohm x m. The toaster is operated at a voltage of 120V. The power drawn by the toaster is closest to

390

370

420

410

380

Answer 1

​​​​​​ P = (117881.28 × 10-6) / 309.4 ×10-6 ​​​​​​W

P = 380.99 W

This value is close to 380.Therefore 380 is the correct answer.

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