A long straight wire carries a current I. What is the magnetic field at a distan
Practice Questions
Q1
A long straight wire carries a current I. What is the magnetic field at a distance r from the wire?
μ₀I/(2πr)
μ₀I/(4πr)
μ₀I/(8πr)
μ₀I/(πr)
Questions & Step-by-Step Solutions
A long straight wire carries a current I. What is the magnetic field at a distance r from the wire?
Step 1: Understand that a long straight wire carrying a current creates a magnetic field around it.
Step 2: Identify the variables: I is the current flowing through the wire, r is the distance from the wire where you want to find the magnetic field, and μ₀ is a constant called the permeability of free space.
Step 3: Use the formula for the magnetic field around a long straight wire, which is B = μ₀I/(2πr).
Step 4: Plug in the values of I (current) and r (distance) into the formula to calculate the magnetic field B.
Magnetic Field Around a Current-Carrying Wire – The magnetic field generated by a long straight wire carrying a current is inversely proportional to the distance from the wire and directly proportional to the current.
