Copper Wire Instructions: Please write your work on a separate pieces of paper.

Question

Copper Wire Instructions: Please write your work on a separate pieces of paper. Please only write one problem per page. Make sure that all work you submit is your own! Resistance Explain conceptually what is elecrtical resistance at the microscopie level. Give an example of a material whose electrical resistance at the microscopie level. Give an example of a material whose electircal resistance is high and an example of a material whose electrical resistance is low. Copper Wire There is an 0.002 N/C electric field inside a copper wire produced by a battery. The wire is 10.0 cm long and a current of 10.0 A is flowing through it. What is the potential difference between the ends of the wire? What is the resistance of the wire? What is the cross sectional diameter of the circular Copper wire? How much power is delivered to the circuit by the battery? Ohrnic Materials When a 10.0 V battery is connected to a wire, the current in the wire is 1.5 A. When a 9.0 V battery is connected to the wire, the current in the wire is 1.3 A. Is the wire composed an ohmic material? How do

Explanation / Answer

2) A) V= integration of E.dl =E*2**l= 0.002*2**10*10^-2 =0.001257V = 1.257mV

B)R=V/I= 0.001257/10=0.0001257A=0.1257mA

C)A=*l^2=*(10*10^-2)^2=0.0314 m^2

D)P=V^2/R= 0.001257^2/0.0001257=0.01257W

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