FCE Reading- Part 6 –Gapped text - E
... There is one extra sentence you do not need to use. Suggested time: 15 minutes. A ...
... There is one extra sentence you do not need to use. Suggested time: 15 minutes. A ...
What is a Magnet?
... Is a nail wrapped in a coil of wire magnetic? Test it by trying to pick up paper clips: YES / NO Is the coil of wire alone magnetic? Test it and see: YES / NO Is the coil of wire connected to the battery magnetic? Test it, and see: YES / NO How many paper clips are you able to pick up? ...
... Is a nail wrapped in a coil of wire magnetic? Test it by trying to pick up paper clips: YES / NO Is the coil of wire alone magnetic? Test it and see: YES / NO Is the coil of wire connected to the battery magnetic? Test it, and see: YES / NO How many paper clips are you able to pick up? ...
Magnetic field
... cobalt, or nickel can be made into permanent magnets by placing them in a strong magnetic field. ► This creates a magnetic field inside the material ► It can retain magnetic properties for a long time. ► Permanent magnets can lose their magnetism if heated or dropped. ► When a magnet is broken, each ...
... cobalt, or nickel can be made into permanent magnets by placing them in a strong magnetic field. ► This creates a magnetic field inside the material ► It can retain magnetic properties for a long time. ► Permanent magnets can lose their magnetism if heated or dropped. ► When a magnet is broken, each ...
Chapter 21 - apel slice
... What do you observe? This experiment is similar to one performed more than 150 years ago by the Danish physicist Hans Christian Oersted. His experiment led to an important scientific discovery about the relationship between electricity and magnetism, otherwise known as electromagnetism. ...
... What do you observe? This experiment is similar to one performed more than 150 years ago by the Danish physicist Hans Christian Oersted. His experiment led to an important scientific discovery about the relationship between electricity and magnetism, otherwise known as electromagnetism. ...
magnetism - ScienceScene
... 3. (5) Label the North (N) and South (S) poles of the wire in the figure. 4. (6) Cut the wire in half and check each piece of the wire with the compass and determine if each piece of wire is still a magnet. 5. (7) Continue to cut the pieces of wire and, after each cut, check to see if each piece is ...
... 3. (5) Label the North (N) and South (S) poles of the wire in the figure. 4. (6) Cut the wire in half and check each piece of the wire with the compass and determine if each piece of wire is still a magnet. 5. (7) Continue to cut the pieces of wire and, after each cut, check to see if each piece is ...
Document
... energy do these devices produce? (Sample answer: Mechanical energy of moving parts, sound, heat, light) Explain to students that in this section they will learn how electrical energy is transformed into other types of energy. ...
... energy do these devices produce? (Sample answer: Mechanical energy of moving parts, sound, heat, light) Explain to students that in this section they will learn how electrical energy is transformed into other types of energy. ...
Lec17 - Purdue Physics
... Hysteresis for a Ferromagnet Lack of retraceability shown is called hysteresis. Memory in magnetic disk and tape Alignment of magnetic domains retained in rock (cf. lodestones) Area enclosed in hysteresis loop ...
... Hysteresis for a Ferromagnet Lack of retraceability shown is called hysteresis. Memory in magnetic disk and tape Alignment of magnetic domains retained in rock (cf. lodestones) Area enclosed in hysteresis loop ...
Inductance Motors Generators
... the contacts to the rotating loop are made by a split ring, or commutator. ...
... the contacts to the rotating loop are made by a split ring, or commutator. ...
The Electric Age - D Cassidy Books
... wires and magnets in relative motion. One basic type of generator (or “dynamo,” as it was often called) was widely used in the nineteenth century. In fact, it remains the basic model for many generators today. This form of generator is basically a coil of wire made to rotate in a steady magnetic fie ...
... wires and magnets in relative motion. One basic type of generator (or “dynamo,” as it was often called) was widely used in the nineteenth century. In fact, it remains the basic model for many generators today. This form of generator is basically a coil of wire made to rotate in a steady magnetic fie ...
* Electromotive Force * Motional emf * Lenz`s law
... the electric and magnetic forces balance each other. For an electron inside the rod (not at the ends) the electrostatic and magnetic forces balance, so e E = evB . Hence the magnitude of the electric field is E = vB ...
... the electric and magnetic forces balance each other. For an electron inside the rod (not at the ends) the electrostatic and magnetic forces balance, so e E = evB . Hence the magnitude of the electric field is E = vB ...
Electricity
Electricity is the set of physical phenomena associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.In electricity, charges produce electromagnetic fields which act on other charges. Electricity occurs due to several types of physics: electric charge: a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields. electric field (see electrostatics): an especially simple type of electromagnetic field produced by an electric charge even when it is not moving (i.e., there is no electric current). The electric field produces a force on other charges in its vicinity. electric potential: the capacity of an electric field to do work on an electric charge, typically measured in volts. electric current: a movement or flow of electrically charged particles, typically measured in amperes. electromagnets: Moving charges produce a magnetic field. Electric currents generate magnetic fields, and changing magnetic fields generate electric currents.In electrical engineering, electricity is used for: electric power where electric current is used to energise equipment; electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.Electrical phenomena have been studied since antiquity, though progress in theoretical understanding remained slow until the seventeenth and eighteenth centuries. Even then, practical applications for electricity were few, and it would not be until the late nineteenth century that engineers were able to put it to industrial and residential use. The rapid expansion in electrical technology at this time transformed industry and society. Electricity's extraordinary versatility means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. Electrical power is now the backbone of modern industrial society.