In subject area: Immunology and Microbiology The permittivity describes the amount of charge that is necessary to form one unit of electric flux in a particular medium and is defined by Farad (the unit for electrical capacitance) per m or cm. ...
electric charge- the quantity of unbalanced electricity in a body (either positive or negative) and construed as an excess or deficiency of electrons; "the battery needed a fresh charge" charge electrostatic charge- the electric charge at rest on the surface of an insulated body (which establishe...
20-3 Electric flux (1)(2) 物理学是整个自然科学和现代工程技术的基础。英文版大学物理课程的开设,首先是使学生掌握专业所必须的物理基础知识和专业词汇;进而要让学生对物理学的内容和方法、工作语言、概念和物理图像,其历史、现状和前沿等方面,从整体上有个全面的了解
The structure is placed in the loop of a superconducting quantum interference device (SQUID) magnetometer; changes of the magnetic flux in phase with the electric field are detected by a lock-in amplifier connected to the output of SQUID electronics. (b,c) In the case of the c axis ...
electric current- a flow of electricity through a conductor; "the current was measured in amperes" current electrical phenomenon- a physical phenomenon involving electricity juice- electric current; "when the wiring was finished they turned on the juice" ...
The intersection of the circle with the imaginary axis, for a given capacitor, takes place in two points F 1 and F 2 which correspond to reference conditions. F 1 corresponds to the lower slip and is the usual self excitation point of induction generators. The p.u. values of ...
Electric cars have always been radically modern; from Woody Allen's Sleeper to the 1.21 gigawatt-flux capacitor that powered Marty McFly's DeLorean Time Machine in Back to the Future, they're the very stuff of science fiction. Yet they're science fact too: Apollo astronauts, you might reme...
Jonny Smith's Flux Capacitor is one of the quirkiest (but most interesting) electric vehicles on the road today. Smith, a British automotive journalist, took an old Enfield 8000 electric city car (built in small numbers in the 1970s) and transformed it into something a lot wilder. O...
a set of devices to convert electric energy into mechanical energy and to regulate the converted energy flux according to a specific law. It is the most common type of drive. History. The first electric drive was devised in Russia in 1838, when B. S. Iakobi tested a DC electric motor ...
After the rotor reaches about 70 to 80% of synchronous speed, the excitation coil is energized and this will produce strong alternating magnetic flux in the pole piece which magnetizes the layer of the permanent magnetic material into a pattern of north and south magnetic poles in the proper ...