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The ampere is an SI base unit and electric current is a base quantity in the International System of Quantities (ISQ). [4]: 15 Electric current is also known as amperage and is measured using a device called an ammeter. [2]: 788 Electric currents create magnetic fields, which are used in motors, generators, inductors, and transformers.
Electricity plays a central role in many modern technologies, serving in electric power where electric current is used to energise equipment, and in electronics dealing with electrical circuits involving active components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.
The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa (the full period is called a cycle). "Alternating current" most commonly refers to power distribution, but a wide range of other applications are technically ...
Angarey or Angaaray (translated alternatively as "Embers" or "Burning Coals") is a collection of nine short stories and a one act play in Urdu by Sajjad Zaheer, Rashid Jahan, Mahmud-uz-Zafar and Ahmed Ali first published in 1932 and generally considered to have marked the beginning of the Progressive Writers' Movement in Indian literature.
If an electric potential is applied to such a solution, the cations of the solution are drawn to the electrode that has an abundance of electrons, while the anions are drawn to the electrode that has a deficit of electrons. The movement of anions and cations in opposite directions within the solution amounts to a current.
As of the 2019 revision of the SI, the ampere is defined by fixing the elementary charge e to be exactly 1.602 176 634 × 10 −19 C, [6] [9] which means an ampere is an electric current equivalent to 10 19 elementary charges moving every 1.602 176 634 seconds or 6.241 509 074 × 10 18 elementary charges moving in a second.
The electric field accelerates these oppositely charged particles in opposite directions, separating them, preventing their recombination, and imparting kinetic energy to each of them. The electron has a much higher charge/mass ratio and so is accelerated to a higher velocity than the positive ion.
Rekhta is an Indian web portal started by Rekhta Foundation, a non-profit organisation dedicated to the preservation and promotion of the Urdu literature. [4] The Rekhta Library Project, its books preservation initiative, has successfully digitized approximately 200,000 books over a span of ten years. [5]