Dear Students, in this video we are going to study a very important topic - Cell, Electric Circuit and Circuit Diagram of chapter 12 Electricity from CBSE Class 10 Science. Hope you find it helpful & interesting. Enjoy Learning!
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An atom has a positively charged nucleus and negatively charged electrons revolving around it.
Valence electrons in metals are free to move within the conductor and constitute an electric current.
The charge is an intrinsic property of matter by virtue of which it can exert electromagnetic force.
A circuit diagram is a graphical representation of an electrical circuit. A schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations while a pictorial circuit diagram uses simple images of components. Unlike a block diagram or layout diagram, a circuit diagram shows the actual electrical connections.
What is Circuit Diagram?
A circuit diagram is a simplified representation of the components of an electrical circuit using either the images of the distinct parts or standard symbols. It shows the relative positions of all the elements and their connections to one another. It is often used to provide a visual representation of the circuit to an electrician.
Components of Circuit Diagram
An electric cell: It provides the source of current. In its symbol, the larger terminal is positive, whereas the smaller one is the negative terminal.
A battery: It is a combination of cells and its utility is the same as the cell.
Switch: It is a plug key used to allow or stop the flow of current upon being pressed. It may be an open or a closed switch.
Wire joint: One device may be connected to the other using wires. This is shown by drawing ‘blobs’ at their point of connectivity.
Wires crossing without joining: The wires that do not touch each other are drawn without blobs.
Electric bulb: The electrical device which uses electricity to glow.
Resistor (R): It is used to restrict the amount of current flow in the circuit.
Ammeter: It is used to measure the current passing at a particular point.
Voltmeter: It is used to measure the voltage between two points in a circuit.
All the above-mentioned topics are described in an interactive and efficient manner so that the students could easily understand them.
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