Electricity and Magnetism What is electricity Electricity is

Electricity and Magnetism

What is electricity? • Electricity is simply the flow of electrons from an abundance to a deficit. Electrons are tiny particles that orbit the core of an atom, and they can hop from one atom to the next.

How is a magnetic field created? • A magnetic field is created by charged particles that are in motion. • The charged particles create electric current. • The interaction of electricity and magnetism produces the electromagnetic force.

Lines of Flux • When a charged particle is in motion, the magnetic force field perpendicular to the motion will be created—known as lines of flux • Outside the magnet the lines of force flow north to south • Inside the magnet the lines of force flow south to north

When electric current is applied to certain materials, this creates an electromagnet. Here is a video that demonstrates this in action.

Fleming’s hand rules • Founded by an English scientist John Fleming. • Fleming’s rule shows the direction of induced current when a conductor moves in a magnetic field. • The right hand rule for the magnetic force. • The left hand rule is used for motor.

Rule # 1: Along a conductor Magnetic Field Conductor Current Flow Right Hand

Rule # 2: Solenoid and electromagnet poles Current Flow Solenoid S N Right Hand

Magnetic lines of flux Generator N N S Conductor on armature Current Flow Source of mechanical energy to rotate shaft Slip rings

Rule # 3: Generator effect Movement of conductor on armature Current flow Magnetic lines of flux Right Hand

Magnetic lines of flux Motor N N S Conductor on rotor Current Flow Slip rings Source of electrical energy Rotating shaft

Rule # 4: Motor principle Movement of conductor on rotor Magnetic lines of flux Current flow Left Hand

Reference • Carlton, R. R. , & Adler, A. M. (2013). Principles of Radiographic Imaging: An Art and a Science (5 th ed. ). Clifton Park, NY: Delmar. • (n. d. ). Retrieved September 16, 2016, from https: //openclipart. org/ • Horseshoe Magnet. (n. d). Retrieved September 19, 2016, from http: //www. clipartbest. com/horseshoe-magnet • St Mary’s H. S. Physic. (n. d). Retrieved September 19, 2016, from http: //www. stmary. ws/High. School/Physics/home/notes/electricity/magnetism/intro/Ma gnetic. Fields. htm • T. (2014). Junkyard Heavy Electric Magnet Machine Picking Up Scrap In Our Truck Fun For Kids. Retrieved September 17, 2016, from Junkyard Heavy Electric Magnet Machine Picking Up Scrap In Our Truck Fun For Kids

References Westar Energy. (n. d. ). Retrieved September 18, 2016, from https: //www. westarenergy. com/kanza-park-what-is-electricity