Radiology & Imaging

This self-powered sensor could make MRIs more efficient

MRI scans are commonly used to diagnose a variety of conditions, anything from liver disease to brain tumors. But, as anyone who has been through one knows, patients must remain completely still to avoid blurring the images ...

Alzheimer's disease & dementia

Scientists uncover new molecular drivers of Alzheimer's

According to the US Centers for Disease Control and Prevention, at least 5.8 million Americans are currently living with Alzheimer's disease, which is the most common form of dementia. There is no cure for Alzheimer's, in ...

Cardiology

Improving models to study the human heart

Northwestern Medicine scientists have developed a new method to measure and optimize the maturation process of cultured heart muscle cells, an approach that has the potential to set the future standard for a common cell model ...

page 1 from 3

Electricity

Electricity (from the New Latin ēlectricus, "amber-like"[a]) is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena, such as lightning and static electricity, but in addition, less familiar concepts, such as the electromagnetic field and electromagnetic induction.

In general usage, the word 'electricity' is adequate to refer to a number of physical effects. However, in scientific usage, the term is vague, and these related, but distinct, concepts are better identified by more precise terms:

Electrical phenomena have been studied since antiquity, though advances in the science were not made until the seventeenth and eighteenth centuries. Practical applications for electricity however remained 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 as a source of energy means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. The backbone of modern industrial society is, and for the foreseeable future can be expected to remain, the use of electrical power.

This text uses material from Wikipedia, licensed under CC BY-SA