Physics » F. Electromagnetism » F.4. Magnetic Forces and Fields

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Introduction to Magnetism

• Overview
• Determining whether two poles of magnets attract or repel each other using the law of magnets
• Identifying the correct lines of flux (magnetic field lines) for a magnetic field

Magnetic Fields Produced by a Current-Carrying Wires

• Overview
• Determining how the current or distance from the wire affects the strength of a magnetic field using the proportion B α I/r

First Right-Hand Rule: Direction of Magnetic Fields and Currents

• Overview
• Determining the direction of the current and the magnetic field using the first right-hand rule

Magnetic Forces on Moving Charges

• Overview
• Solving problems involving the magnetic force on a moving charge using the equation F_B = |q|vBsinθ
• Solving problems involving the radius of a charge’s circular path using the equation r = mv/qB

Magnetic Forces on Current-Carrying Wires

• Overview
• Solving problems involving the magnetic force on a current-carrying wire using the equation F_B = IlBsinθ

Second Right-Hand Rule: Direction of Magnetic Forces

• Overview
• Determining the direction of a magnetic force on a moving charge in a magnetic field using the second right-hand rule
• Determining the direction of a magnetic force on a current carrying wire in a magnetic field using the second right-hand rule