Magnetism - Howard Elementary School
... repel and opposites attract, and the force between is inversely proportional to the distance between them. This means that closer is stronger, and further is weaker. Electric charges are positive or negative, magnetic poles are north or south. One main difference is that magnetic poles cannot be iso ...
... repel and opposites attract, and the force between is inversely proportional to the distance between them. This means that closer is stronger, and further is weaker. Electric charges are positive or negative, magnetic poles are north or south. One main difference is that magnetic poles cannot be iso ...
Cathode ray deflection tube
... The electron gun shoots out a beam of electrons across an evacuated tube. It hits a fluorescent screen placed in its path and when it does the screen glows. If there is no voltage between the two plates the beam will go along the middle of the scale. Beams of electrons (cathode rays) move in straigh ...
... The electron gun shoots out a beam of electrons across an evacuated tube. It hits a fluorescent screen placed in its path and when it does the screen glows. If there is no voltage between the two plates the beam will go along the middle of the scale. Beams of electrons (cathode rays) move in straigh ...
Lesson 1: Magnets have 2 poles. Like poles attract, unlike poles
... strongest around the poles of a magnet. Vocab: magnet Magnetism Magnetic pole Magnetic force Lesson 2: Magnetic fields spread out from one pole to the other. They are curves lines that never cross. The field lines are strongest where they are closest together. Earth is like a giant bar magnet. Compa ...
... strongest around the poles of a magnet. Vocab: magnet Magnetism Magnetic pole Magnetic force Lesson 2: Magnetic fields spread out from one pole to the other. They are curves lines that never cross. The field lines are strongest where they are closest together. Earth is like a giant bar magnet. Compa ...
The Left Hand Rule - World of Teaching
... • An electric motor is a motor that uses electrical energy to produce mechanical energy, usually through the interaction of magnetic fields and currentcarrying conductors. • Electric motors are used in most, modern machines. Obvious uses would be in rotating machines such as fans, turbines, drills, ...
... • An electric motor is a motor that uses electrical energy to produce mechanical energy, usually through the interaction of magnetic fields and currentcarrying conductors. • Electric motors are used in most, modern machines. Obvious uses would be in rotating machines such as fans, turbines, drills, ...
21.1 Magnets & Magnetic Fields
... 2) It changes voltage and current by generating a changing magnetic field in one coil. 3) This field then induces a current in a nearby coil with a different # of turns. 4) We need transformers to step up power to send it over long distances & step down power to make it safe to use in homes ...
... 2) It changes voltage and current by generating a changing magnetic field in one coil. 3) This field then induces a current in a nearby coil with a different # of turns. 4) We need transformers to step up power to send it over long distances & step down power to make it safe to use in homes ...
Chapter 18
... Magnetism is a naturally occurring force that can be felt but not seen. The compass needles follow the magnetic field lines! ...
... Magnetism is a naturally occurring force that can be felt but not seen. The compass needles follow the magnetic field lines! ...
Hall effect
The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.The Hall coefficient is defined as the ratio of the induced electric field to the product of the current density and the applied magnetic field. It is a characteristic of the material from which the conductor is made, since its value depends on the type, number, and properties of the charge carriers that constitute the current.