What is the magnetic field inside a long straight conductor carrying current I?

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Question: What is the magnetic field inside a long straight conductor carrying current I?

Options:

Correct Answer: μ₀I/2πr

Solution:

Using Ampere\'s Law, B = μ₀I/2πr for a long straight conductor.

What is the magnetic field inside a long straight conductor carrying current I?

What is the magnetic field inside a long straight conductor carrying current I?

Step 1: Understand that a long straight conductor is a wire that carries an electric current (I).
Step 2: Know that the magnetic field (B) is created around the wire when current flows through it.
Step 3: Use Ampere's Law, which relates the magnetic field to the current and distance from the wire.
Step 4: The formula for the magnetic field around a long straight conductor is B = μ₀I / (2πr).
Step 5: In this formula, μ₀ is the permeability of free space (a constant), I is the current, and r is the distance from the center of the wire.
Step 6: Remember that this formula gives the magnetic field at a distance r from the wire, not inside the wire itself.

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