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Saturday, 17 June 2017

A good conductor while carrying current is

  MOHAMMAD ZEESHAN       Saturday, 17 June 2017

A wire Carrying Current is?

A good conductor while carrying current is
  1. negatively charged
  2. positively charged
  3. electrically charged
  4. alternately charged positive and negative
Answer: Negatively Charged

Current Carrying Conductor

An electric current is a flow of electric charge. In electric circuits, this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma).

The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.

Electric currents cause Joule heating, which creates light in incandescent light bulbs. They also create magnetic fields, which are used in motors, inductors and generators.

The moving charged particles in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.

A good conductor while carrying current is negatively charged.

In a conductive material, the moving charged particles which constitute the electric current are called charge carriers. In metals, which make up the wires and other conductors in most electrical circuits, the positively charged atomic nuclei are held in a fixed position, and the negatively charged electrons are free to move, carrying their charge from one place to another. In other materials, notably the semiconductors, the charge carriers can be positive or negative, depending on the dopant used. Positive and negative charge carriers may even be present at the same time, as happens in an electrochemical cell.
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