Electricity and circuits

electricity and circuits
class 6 science
ncert
cell battery
electric connections

1. Electricity and circuits

2. Electric bulb connected to electric cell Electric Bulb connected to Electric Cell An electric cellproduces electricity capable enough to make a bulb glow. To make a bulb glow using a cell, a wire needs to be connected from one terminal of the cell to one terminal of the bulb. Similarly, the other terminal of the cell must be connected to second terminal of the bulb. The bulb will not glow in case the above is not followed and the connections are not made properly

3. Arrangements

4. Electric circuit The electric circuits are closed-loop or path which forms a network of electrical components, where electrons are able to flow. This path is made using electrical wires and is powered by a source, like a battery. The start of the point from where the electrons start flowing is called the source whereas the point where electrons leave the electrical circuit is called the return. Let’s conduct a small experiment, you would need the following, Electric bulb Wire Electrical tape A battery

5. Torch A torch is a portable electric lamp which uses two or more cells to light a small bulb. A torch is used to provide light in the dark when it is switched on. A torch consists of a simple electric circuit in which two or more cells are connected to a torch bulb through a sliding switch. When the torch is needed to provide light, the sliding switch is closed by pushing it forward so that the circuit is completed and the bulb of the torch lights up. When the torch is not needed, the sliding switch is opened by pushing it backwards so that the circuit breaks and the bulb are turned off. 

6. Torch

7. Home made torch

8. Electric switch Electric Switch  is an electrical device which can make or break an electric circuit. A switch is said to be in  ‘ON’ position when it  makes or completes the circuit  and allows the current to pass through. Similarly, a switch is in  ‘OFF’ position when it  breaks the circuit  and does not allow the current to pass through.

9. Simple switch

10. Conductors and insulators Materials which allow electric current to pass through them are called conductors of electricity. Examples are iron nail, key, safety pin, water, human bodyetc. Materials which do not allow electric current to pass through them are called insulators of electricity. Examples are rubber, plastic, glass, air, clothetc. Conductors are mainly metallic while insulators are non-metallic. Electrical devices are made up of conductors. To avoid passing of the current to human body during their handling, these devices have a covering of insulators (like plastic, wood, aluminum) over them.