Electric field creates a 3.9 ma current in a 1.0-mm-diameter wire. what material is the wire made of?

The wire made of Nichrome  

The ρ resistivity of an object is the ratio of the magnitude of the electric field to the current density

Can be formulated:

Current density (J) itself is the ratio of currents per unit area of cross-section

Can be formulated:

Complete questions from the assignments above can be stated as follows:

A 0.0075 V / m electric field creates a 3.9 mA current in a 1.0 mm diameter wire. What is the wire made of?

a) Aluminum (resistivity: 2.82 * 10 ^ -8)

b) Nichrome (resistivity: 1.1 * 10 ^ -6)

c) Copper (resistivity: 1.68 * 10 ^ -8)

d) Iron (resistivity: 1.0 * 10 ^ -7)

If we see the question above then to find the resistivity of the material we must find the wire cross-section area first

Known value

E = 0.0075 V / m

I = 3.9 mA = 3.9.10⁻³ A

d = 1.0 mm = 1.10⁻³ m

A = 1 / 4 π.d²

A = 1 / 4. π. (10⁻³)²

A = 1/4 . π . 10⁻⁶

so that

ρ = 1.5.10⁻⁶ ohm . m

From this value the material which approaches its resistivity is Nichrome with resistivity: 1.1 . 10⁻⁶ ohm.m

the flow of electric current.

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Electric current

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The direction of the magnetic field

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An electric current produces a magnetic field.

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the direction of the electric field

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Keywords: the magnetic field, electric current, resistivity , Nichrome  

the correct name for the n3 ion is azide. azide is a polyatomic anion with a -1 charge and is written as n3 -1. it consists of three nitrogen atoms bonded together. hope i . let me know if you need anything else.

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explanation:

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