The document discusses household electric circuits. It describes how electricity enters the house through two drop wires connected to the electric meter. From the meter, wires go through the main switch and panel board, which contains fuses or circuit breakers to protect circuits. Circuits from the panel board include lighting circuits for fixtures and power circuits for outlets and sockets. The main components of a household circuit are identified as the electrical meter, main switch, panel board, sockets, loads, connecting wires, and switches.

1. ELECTRIC CIRCUITS

2. HOUSE WIRING
How is your house
wired?
Can you trace the
electrical connection
around your house?

3. Outside of the house – two wires
leading to your house (drop wires)
which having a voltage of
220 volts (V).

4. These two wires are
connected to the electric
meter.

5. From the meter, the wires go through
the main switch.

6. From the main switch, wires
go through the panel board
and branch out to the
different parts of the
house.

7. In the panel board, fuses or
circuit breakers are found.
protect a circuit in event of
an overload.

8. Circuits branching out from
the panel board are:
 A. lighting circuits – lightning fixtures of the
house
 B. power circuits - electrical outlets and
sockets

9. MAIN COMPONENTS OF A
HOUSEHOLD CIRCUIT





A. electrical meter
B. Main switch
C. Panel Board
D. Sockets
E. Loads (electrical devices and
appliances)
 F. Connecting wires
 G. Switches

10. 1. How many power circuits
do you have?
2. How many sockets are
there in your power circuit?
3. Do you have enough
sockets for your home
appliances?

11. SIMPLE ELECTRIC CIRCUIT
 CIRCUIT – any arrangement of materials that
provides a path of electrons to flow.
It is composed of:
a. electrical energy
b. load (electrical appliances)
c. connecting wires
It can be opened or closed by turning the switch.

13. Circuit diagram
When the
switch is open,
there is no
electric current.

14. SEATWORK:
 IDENTIFY TWO SIMPLE CIRCUITS FOUND IN
OUR HOME.

15. Review:
1. What is the charge of an electron?
2. What is the charge of a proton?
3. What is the charge of the neutron?
4. What is the basic unit of electric
charge?

16. SI UNITS used in electricity:
 VOLTS (V): unit of potential difference, emf,





or voltage
OHM (Ω): unit of resistance
AMPS (AMPERES) (A): unit of current
COULOMBS (C): unit of charge (= the
charge moved when one amp of current runs
for one second).
WATTS (W): unit of power (power energy
per unit time). In electrical circuits, one
watt is produced when a current of one
amp flows down a potential difference
of one volt.
JOULE (J): unit of energy.