A toaster rated at 1050 W operates on a 120V household circuitand a 4.00 m length of a nichrome wire as its heatingelement. The operating temperature of this element is 320degrees celsius. What is the cross-sectional area of the wire?

sodni3

sodni3

Answered question

2021-05-16

A toaster rated at 1050 W operates on a 120V household circuitand a 4.00 m length of a nichrome wire as its heatingelement. The operating temperature of this element is 320degrees celsius.
What is the cross-sectional area of the wire?

Answer & Explanation

SabadisO

SabadisO

Skilled2021-05-18Added 108 answers

P=V2R
R=ρLA
ρ=ρ0[1+α(TT0)]
A=ρLR=ρLPV2=ρ0LP[1+α(TT0)]V2
The book I have gives for nichrome:
ρ0=1×106ρmT0=20C
α=0.0004C1

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