Magnetic field due to current carrying loop

TL;DR

A circular current loop creates a magnetic field that resembles the field lines of a bar magnet.

Transcript

• [Narrator] In a previous video, we saw that a straight wire carrying an electric current produces magnetic fields which are in concentric circles. In this video, we will explore what do the magnetic fields lines look like for a circular loop of wire carrying an electric current. And a small spoiler alert, you may be familiar with these field patt... Read More

Key Insights

• 🏑 Iron filings can be used to visualize the magnetic field pattern of a circular current loop.
• 💁 The magnetic field near the wire forms concentric circles.
• 🫱 The right-hand thumb rule can be applied to determine the direction of the magnetic field at different sections of the wire.

Questions & Answers

Q: How can the magnetic field pattern of a circular current loop be visualized?

Iron filings are used to visualize the magnetic field pattern. When current is passed through the loop, the iron filings arrange themselves to reveal the field lines.

Q: What does the magnetic field look like near the wire of the circular current loop?

Near the wire, the magnetic field forms concentric circles. As you move farther away from the wire, the circles become larger and flatter.

Q: How can the right-hand thumb rule be applied to determine the direction of the magnetic field?

The right-hand thumb rule can be applied by clenching the right hand around a section of the wire so that the thumb points in the direction of the current. The four encircling fingers then indicate the direction of the magnetic field.

Q: What is the relationship between a current carrying loop and a bar magnet?

A current carrying loop produces a magnetic field pattern similar to that of a bar magnet. The loop can be seen as a tiny bar magnet, with one side resembling the north pole and the other side resembling the south pole.

Key Insights:

• Iron filings can be used to visualize the magnetic field pattern of a circular current loop.
• The magnetic field near the wire forms concentric circles.
• The right-hand thumb rule can be applied to determine the direction of the magnetic field at different sections of the wire.
• A current carrying loop resembles a tiny bar magnet, with one side acting as the north pole and the other side as the south pole.

Summary & Key Takeaways

• The video demonstrates how iron filings can be used to visualize the magnetic field pattern of a circular current loop.

• The magnetic field near the wire forms concentric circles, which become larger and flatter as you move away from the wire.

• By applying the right-hand thumb rule to clasp different sections of the wire, the direction of the magnetic field can be determined.