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

Power, P = 722.96 watts

Explanation:

It is given that,

Voltage, V = 120 V

Length of nichrome wire, l = 8.9 m

Diameter of wire, d = 0.86 mm

Radius of wire, r = 0.43 mm = 0.00043 m

Resistivity of wire,

We need to find the power drawn by this heater. Power is given by :

And,

P = 722.96 watts

So, the power drawn by this heater element is 722.96 watts. Hence, this is the required solution.    

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