What is electric current 7th class?

An electric current is a flow of electric charge. This electric charge is carried by moving electrons(charge carriers) in a wire. Electric current is measured as rate of flow of charge. The SI unit for measuring an electric current is the Ampere (A). Electric current is measured using a device called an Ammeter.

What is electric current answer?

Electric current is defined as the rate of flow of negative charges of the conductor. In other words, the continuous flow of electrons in an electric circuit is called an electric current. The conducting material consists a large number of free electrons which move from one atom to the other at random.

What is an electric circuit short answer Class 7?

Answer: An electric circuit can be defined as a closed path through which electric current can flow. Various components such as battery, resistor, wire, key, bulb etc. can be connected in different ways to construct an electric circuit.

What is current explain?

Current is the rate at which electrons flow past a point in a complete electrical circuit. At its most basic, current = flow. … It expresses the quantity of electrons (sometimes called “electrical charge”) flowing past a point in a circuit over a given time.

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What is current and its types?

Current electricity is a constant flow of electrons. There are two kinds of current electricity: direct current (DC) and alternating current (AC). With direct current, electrons move in one direction. Batteries produce direct current. In alternating current, electrons flow in both directions.

What is Ohm’s law state?

Ohm’s law states that the current through a conductor is proportional to the voltage across the conductor. … V=IR where V is the voltage across the conductor and I is the current flowing through it.

What is electric potential class 10th?

Electric potential (also called the electric field potential or the electrostatic potential) is the amount of work needed to move a unit positive charge from a reference point to a specific point inside the field without producing any acceleration.

What is SI unit current?

Unit of electric current: ampere (A)

The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 ×1019 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ∆νCs.

How electric current is produced?

To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges. The pathway to carry the charges is usually a copper wire.

What is electric circuit with diagram?

A circuit diagram (also known as an electrical diagram, elementary diagram, or electronic schematic) is a simplified conventional graphical representation of an electrical circuit. … Arrangement of the components interconnections on the diagram does not correspond to their physical locations in the finished device.

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What is the symbol of battery Class 7?

Symbols for Electrical Components (or Circuit Symbols)

(2) The symbol of battery consists of two cells joined together. In the symbol for a battery, the positive terminal of one cell is joined to the negative terminal of the other cell.