Electricity And Circuits - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Points To Remember:
An electric cell is a device that converts chemical energy into electrical energy. It has two metal plates indicating two terminals-negative and positive. It has chemical inside it.
Arrangement that provides a complete path for electricity to pass (current to flow) is known as electric circuit.
When the two terminals of the bulb are connected with that of electric cell by wires, a current pass through the filament of the bulb and it makes the bulb glow.
The simple device that either breaks the circuit or completes it is called switch.
Materials that allow electric current to pass through them are called conductors. For example iron, copper etc. Metals are good conductors.
Materials that do not allow electric current to pass through them are called insulators. For example-rubber, plastic etc.
Rubbers and plastic are used to cover electric wires and plug tops because they are insulators and do not allow electric current to pass when we touch plugs and switches.
