Class 7 CBSE electric circuit presentation

1. Power Stations
Home
Transformers

2. How are the fans, television, light
bulbs connected from these electric
transformers ????
Are they directly connected to
the electric current wires?

4. Electric circuit
• Electric circuit simply means a
closed path of wires
• Through these wires the current
flows to the electric bulb,
electric fan and other
appliances.
• They include switches, fuses.

5. How will be draw the electric circuit?
Electric component Symbol
Cell
Bulb
Or
Wire
Switch

6. Lets draw a simple circuit
Switch is open

7. Switched closed

8. What is battery?
Electric cell
A combination of two or more cells is called a battery

9. Arrangement of cells in battery
The positive terminal of one
cell is connected to the
negative terminal of the
next cell.
Sometimes the cells are
placed side by side. There
is usually a thick wire or a
metal strip connecting the
positive terminal of one cell
to the negative terminal of
the next cell

10. Batteries

11. Symbol of battery

12. 1.Identify the below symbol of electric circuit.
2. What happens to the electric circuit when the switch is open or
off?
3.What happens when electric cells are not arranged in
specific order in a torch?

13. Homework
• Draw an electric circuit of a torch