If a Current of 2

question 7

Multiple Choice

If a current of 2.4 A is flowing in a wire of diameter 2.0 mm, what is the average current density?

• A)7.6 × 10⁵ A/m²
• B)5.2 × 10^-6 A/m²
• C)1.9 × 10⁵ A/m²
• D)3.6 × 10⁵ A/m²
• E)21 × 10^-6 A/m²

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Definitions:

Atoms

Atoms are the basic units of matter, consisting of a nucleus surrounded by electrons. They are the fundamental building blocks of chemical elements.

Cleavage

The tendency of a mineral to break along flat, even surfaces as a property of its crystalline structure.

Periodic Table

Table that organizes all the chemical elements according to the element’s atomic number and electron orbitals.

Cu

The chemical symbol for copper, a ductile metal with very high thermal and electrical conductivity.