consider a portable electric blanket that runs on a 6 V battery. If you use copper wire with a 0.5 mm diameter as the heating element, how long should the wire (in units of meters) if you want to generate 20W of heating power? (Take the resistivity of the copper wire as p=1.7x 10^-8 ohm.m)

consider a portable electric blanket that runs on a 6 V battery. If you use copper wire with a 0.5 mm diameter as the heating element, how long should the wire (in units of meters) if you want to generate 20W of heating power? (Take the resistivity of the copper wire as p=1.7x 10^-8 ohm.m)

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter9: Optics

Section: Chapter Questions

Problem 25Q

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

q10-

I don't understand here, do we need to divide the diameter in half for the radius. Otherwise, can we continue with 0.5?

Istma elemanı olarak 0.5 mm çapında bakır tel kullanılan ve 6 V'luk pille çalışan taşınabilir bir
elektrikli battaniye düşünelim.
Bu durumda 20 W isitma gücü üretmek için tel uzunlugu metre biriminde ne kadar olmalıdır?
(Bakırın özdirencini p = 1.7 x 10-8N. m olarak alınız.)
%3D
Answer:

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