PHYS by: x Problem coil is formed by wind x C A shared/assignment/rest/qprint.un

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PHYS by: x Problem coil is formed by wind x C A shared/assignment/rest/qprint.uni Coil is Formed uni By Wine x tudent/main Chrome genwileyplus.com/edugo Google gen.wieyplus. https G A //educ AHMED ALTA l htt 20 1304 002: Introductory Electricity and Magnetism Hwe "Chapter 26. Problem O46 A copper wire of cross-sectional area 2.20 10 m2 and length 3.60 m has a current of 2.oo uniformly distributed across Ca) thermal energy in 25.0 min? of the electric field along the wire much A (a) electrical is erred Number (b) Number Answer Question Attemptsi 0 of 5 used

Explanation / Answer

A = 2.2*10^-6 m^2, L = 3.6 cm , I = 2 A

copper resistivity p =1.7*10^-8 ohm.m

R = pL/A

R = 1.7*10^-8*0.036/(2.2*10^-6)

R = 0.000278 ohms

(a) V= IR

E = V/d = IR/L

E = 2*0.000278/0.036

E = 0.0154 V/m

(b) P = I^2*R

Q/t = I^2*R

Q = 2*2*0.000278*25*60

Q = 1.668 J

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