What is the magnetic field due to a long straight wire carrying current I at a d

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Question: What is the magnetic field due to a long straight wire carrying current I at a distance r from the wire?

Options:

Correct Answer: μ₀I/2πr

Solution:

The magnetic field due to a long straight wire is given by B = (μ₀I)/(2πr).

What is the magnetic field due to a long straight wire carrying current I at a distance r from the wire?

What is the magnetic field due to a long straight wire carrying current I at a distance r from the wire?

Step 1: Understand that a long straight wire carrying current creates a magnetic field around it.
Step 2: Identify the variables: I is the current flowing through the wire, and r is the distance from the wire where you want to find the magnetic field.
Step 3: Learn the formula for the magnetic field (B) around a long straight wire: B = (μ₀I)/(2πr).
Step 4: Recognize that μ₀ is a constant called the permeability of free space, which has a value of approximately 4π × 10^-7 T·m/A.
Step 5: Plug in the values of I (current) and r (distance) into the formula to calculate the magnetic field B.

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