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Multiple choice questions lend themselves to the development of objective assessment items, but without author training, questions can be subjective in nature. Because this style of test does not require a teacher to interpret answers, test-takers are graded purely on their selections, creating a lower likelihood of teacher bias in the results. [8]
Left: Housing with internal permanent magnet rotating through the friction wheel. Right: Induction coil A bottle dynamo or sidewall dynamo is a small electrical generator for bicycles employed to power a bicycle's lights .
2-XL (2-XL Robot, 2XL Robot, 2-XL Toy) is an educational toy robot that was marketed from 1978–1981 [1] by the Mego Corporation, and from 1992–1995 by Tiger Electronics. 2-XL was the first "smart-toy" in that it exhibited rudimentary intelligence, memory, gameplay, and responsiveness.
Fun School 6 is the sixth set of educational games, created in 1996 by Europress Software released on Windows. The three individual games catered for children aged between 4 and 7 years, between 6 and 9 years and between 8 and 11 years respectively and had their own specific themes but each of the five topics remained in the same category with ...
This magnetic energy value is about 18 times greater than "ordinary" ferrite magnets by volume and 12 times by mass. This magnetic energy property is higher in NdFeB alloys than in samarium cobalt (SmCo) magnets, which were the first type of rare-earth magnet to be commercialized. In practice, the magnetic properties of neodymium magnets depend ...
Magnets exert forces and torques on each other through the interaction of their magnetic fields.The forces of attraction and repulsion are a result of these interactions. The magnetic field of each magnet is due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the mater
A magnetic field in a coil of wire and the electric current in the wire. The force of a magnetic field on a charged particle, the magnetic field itself, and the velocity of the object. The vorticity at any point in the field of the flow of a fluid; The induced current from motion in a magnetic field (known as Fleming's right-hand rule).
A magnet's magnetic moment (also called magnetic dipole moment and usually denoted μ) is a vector that characterizes the magnet's overall magnetic properties. For a bar magnet, the direction of the magnetic moment points from the magnet's south pole to its north pole, [ 15 ] and the magnitude relates to how strong and how far apart these poles ...