Magnetic Fields Notes

Describe the concept of a magnetic field.

Magnetic Field: a vector field representing the invisible influence surrounding moving electric charges, electric currents, or magnetic materials, which exerts forces on other charges and materials

Sketch magnetic field lines due to a moving electric charge, electric currents and magnets.

Describe the generation of a magnetic field from a moving electric charge.

Magnetic field from a moving charge: A moving electric charge creates a magnetic field that forms circular field lines around its path.

Right Hand Rule β†’ Thumb: Direction of charge motion

Right Hand Rule β†’ Fingers Curl: Direction of magnetic field

Solve problems involving the magnitude and direction of magnetic fields around a straight electric current-carrying wire and inside a solenoid using 𝐡 = πœ‡π‘œπΌ 2πœ‹π‘Ÿ and 𝐡 = πœ‡π‘œπ‘›πΌ.

B: Magnetic Flux density/ field strenght

I: Current in wire

r: Distance away from wire

Magnetic constant: 4(pi) * 10^-7

Describe the force experienced by electric current-carrying conductors and moving electric charges when placed in a magnetic field.

Force on a current‑carrying conductor in a magnetic field: A conductor carrying current experiences a force when placed in a magnetic field because the moving charges in the wire interact with the field.

Solve problems involving the magnetic force on an electric current-carrying wire and moving charge in a magnetic field using 𝐹 = π΅πΌπΏπ‘ π‘–π‘›πœƒ and 𝐹 = π‘žπ‘£π΅π‘ π‘–π‘›πœƒ.

F: Magnetic Force

B: Magnetic flux density

I: Current in wire

L: Length of overalp of B & I

Theta: Angle between B & I

Interpret data relating to the force acting on a conductor in a magnetic field.

Interpret data relating to the strength of a magnet at various distances.