Electromagnetic Induction (2) Electromagnetic Induction (1) Motional EMF ●
... S does not move but the flux through S changes in time. ● By the principle of relativity, we should expect EMF around C; EMF = -dO/dt. In this frame of reference there is an induced electric field; ...
... S does not move but the flux through S changes in time. ● By the principle of relativity, we should expect EMF around C; EMF = -dO/dt. In this frame of reference there is an induced electric field; ...
Topic 6 - Generators and Motors
... • An AC generator – the most common type – has a coil of wire rotating inside a stationary field magnet. • The electricity produced by this type of generator is called alternating current because it changes direction (in N. America it changes direction 120 times per second) ...
... • An AC generator – the most common type – has a coil of wire rotating inside a stationary field magnet. • The electricity produced by this type of generator is called alternating current because it changes direction (in N. America it changes direction 120 times per second) ...
R Ch 37 Electric Induction pg 1
... R Ch 37.3 Generators & Alternating Current pg 5 • Generators – convert mechanical energy to electric energy • Motors – convert electric energy to mechanical energy • A generator spins a coil of wire inside a magnet, and as it spins the N pole & S pole pull the electrons back and forth causing AC (a ...
... R Ch 37.3 Generators & Alternating Current pg 5 • Generators – convert mechanical energy to electric energy • Motors – convert electric energy to mechanical energy • A generator spins a coil of wire inside a magnet, and as it spins the N pole & S pole pull the electrons back and forth causing AC (a ...
Electric current
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.Electric currents cause Joule heating, which creates light in incandescent light bulbs. They also create magnetic fields, which are used in motors, inductors and generators.The particles that carry the charge in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom, and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.