Force on a charged particle, derivation required at higher level only Magnetic flux
Faraday’s law Induced emf Alternating voltage Alternating current Transformer
CONCEPTS: Magnetism (poles exist in pairs) Vector nature of magnetic fields (magnetic field lines/magnetic flux) Definition and units for magnetic flux and magnetic flux density Force on a current-carrying conductor in a magnetic field Force on a charged particle moving through a magnetic field Force between currents Definition of the ampere Faraday’s law Lenz’s law Change of mechanical energy to electrical energy due to electromagnetic induction Alternating voltages and currents (graphs of voltage or current against time, rms and peak values) Concepts of mutual induction and self-induction Structure and principle of operation of a transformer Inductor and the effects of induction on a.c.
ACTIVITIES: Plot a magnetic field due to a bar magnet Demonstration of magnetic field due to: (i) a long straight wire (ii) a loop (iii) a solenoid
Demonstration of the force on a current-carrying conductor in a magnetic field