Opposite poles attract, while like poles repel. Magnetic fields are created by moving electric charges.

Electric current flowing through a wire creates a circular magnetic field around the wire. The right-hand rule helps determine the field's direction.

The strength of the magnetic field is calculated using the formula B = μ₀ * I / (2πR), where I is the current and R is the distance from the wire. Increased current increases field strength, while increased distance weakens it.

Demonstrates how to calculate the magnitude and direction of the magnetic field around a current-carrying wire using the formula and the right-hand rule.

A magnetic field exerts a force on a current-carrying wire. The strength of the magnetic force is calculated using F = I * L * B * sin(θ).

Explains how to use the right-hand rule to determine the direction of the magnetic force on a wire, emphasizing that the force is perpendicular to both the current and the magnetic field.

Presents example problems demonstrating how to calculate the magnitude and direction of the magnetic force on a current-carrying wire in a magnetic field.

Introduces the equation for the magnetic force on a single moving charge: F = qvBsin(θ), where q is the charge, v is the velocity, and B is the magnetic field.

Explains how to use the right-hand rule to determine the direction of the magnetic force on a moving charge, noting that the force on an electron is in the opposite direction.

Demonstrates the calculation of the magnetic force acting on a proton moving in a magnetic field.

A charged particle moving perpendicular to a magnetic field will move in a circle. Discusses the difference in direction between a proton and electron.

The radius of the circular path can be calculated by equating the centripetal force (mv²/R) with the magnetic force (qvB).

Explains how to convert kinetic energy from joules to electron volts.

Parallel wires with currents in the same direction attract each other, while wires with opposite currents repel. This is due to the magnetic field created by one wire exerting a force on the other.

The force is given by F = (μ₀ * I₁ * I₂ * L) / (2πR), where I₁ and I₂ are the currents, L is the length of the wires, and R is the distance between them.

Ampere's Law related the integrated magnetic field around a closed loop to the current enclosed by that loop.

A solenoid is a coil of wire that creates a strong magnetic field inside the coil when current flows through it. Includes derivation of the equation B=μ₀nI, where n is the number of turns per unit length.

Example of calculating the magnetic field strength inside a solenoid.

Explains that a current-carrying loop in a magnetic field experiences a torque, causing it to rotate. The torque is calculated using τ = NIABsin(θ).

Maximum torque happens when the magnetic field is parallel to the surface of the coil.

Two examples for the torque equation is presented and worked out.