A) A long wire with a radius of 0.450 cm carries a current. The potential difference across a 3.60 m long section of this wire is 11.0 V, and the wire carries a current of 0.380 A. -What is the resistance (in Ω) of the 3.60 m long section of wire? _______________Ω -What is the resistivity (in Ω · m) of the wire? _______________Ω· m
A) A long wire with a radius of 0.450 cm carries a current. The potential difference across a 3.60 m long section of this wire is 11.0 V, and the wire carries a current of 0.380 A. -What is the resistance (in Ω) of the 3.60 m long section of wire? _______________Ω -What is the resistivity (in Ω · m) of the wire? _______________Ω· m
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Question
A) A long wire with a radius of 0.450 cm carries a current. The potential difference across a 3.60 m long section of this wire is 11.0 V, and the wire carries a current of 0.380 A.
-What is the resistance (in Ω) of the 3.60 m long section of wire?
_______________Ω
-What is the resistivity (in Ω · m) of the wire?
_______________Ω· m
B)Germanium is a semiconducting metal with a resistivity of 0.460 Ω · m.
-Determine the current per unit area through a 4.52 V germanium junction with a length of 2.24 mm. (Enter your answer in A/m2.)
___________A/m2
-Find the current (in A) through the junction if its cross-sectional area is 2.50 ✕ 10−5 m2.
___________A
Expert Solution
Step 1
Current in the circuit = Potential difference/ Resistance of wire.
Using relation between resistance and resistivity of a wire we can get the resistivity.
Resistance of a wire is inversely proportional to area of cross section and length of wire.
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