Question

what is electric current which is the device used to measure electric current in the circuit how should the device be connected in the circuit

Answer 1

An electric current is a flow of electric charge.[1]:2 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).[2]

Electric current

A simple electric circuit, where current is represented by the letter i. The relationship between the voltage (V), resistance (R), and current (I) is V=IR; this is known as Ohm's law.

Common symbols

ISI unitampere

Derivations from
other quantities

{\displaystyle I={V \over R}\,,I={Q \over t}}DimensionI

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.[3]

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.

Answer 2

• The connection of many electric wires to a single socket is called short circuit. The function of fuse in these situations is to cut off the rising load. In this situation, the fuse wire which is low in electrical resistance, melts due to rising current and breaks the circuit.