Magnetic Force: Wires ^🔗

Instead of thinking about individual particles, we can think about the aggregate of them as current in a wire.

$$ \begin{aligned} Force &= B-Field \times Current \times Length \newline F &= BIL \end{aligned} $$

Use it for Textbook 19B Q1, 2

Current in Magnetic Field ^🔗

• When a current-carrying wire is placed in a magnetic field it will experience a force.
• We can use the RH slap rule to deermine the direction of the force experienced by the current-carrying wire.
• Reversing the current direction inverts the force direction.
• Increasing field strength, current or length of wire in the field, increases the force felt.

Current-Carrying Wire ^🔗

• Magnetic fields exist around current carrying wires
• The magnetic field is circular around the wire
• The direction of the field depends on a right hand grip rule!

Mahi ^🔗

1. Textbook 19B Q1, 2 (starter questions)
2. Textbook 19B Q3, 4
3. Homework Booklet C2