What is the magnetic field due to a long straight wire carrying current I at a distance r from the wire?
Practice Questions
1 question
Q1
What is the magnetic field due to a long straight wire carrying current I at a distance r from the wire?
μ₀I/2πr
μ₀I/4πr
μ₀I/πr
μ₀I/8πr
The magnetic field due to a long straight wire is given by B = (μ₀I)/(2πr).
Questions & Step-by-step Solutions
1 item
Q
Q: What is the magnetic field due to a long straight wire carrying current I at a distance r from the wire?
Solution: The magnetic field due to a long straight wire is given by B = (μ₀I)/(2πr).
Steps: 5
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.
