Lorentz force

• Magnetic fields are produced by moving charges, electric currents or magnets
• The magnetic field is the vector quantity that describes the direction and strength of the magnetic influence at any point.
• The magnetic field lines always form closed loops around the magnet.
• A compass needle is used to detect the direction of the Earth's magnetic field.
• Electricity can be generated using a generator which converts mechanical energy into electrical energy.
• Ampere's Law states that the line integral of B around any closed loop is equal to the total current passing through an area bounded by the loop.
• Fleming’s Left Hand Rule (LHR) can be used to determine the direction of motion of a charged particle when it moves perpendicularly across a uniform magnetic field.
• A compass needle can be used to detect the presence of a magnetic field.