UEC College Ikorodu-Lagos students making a simple electric circuit |
An electric circuit
is an arrangement of conductors for the purpose of carrying current.
However, before
electric current can flow in a circuit, two conditions must be met; namely:
1.
There must be a
source of electromotive force (emf)
to overcome the resistance of the circuit, and so drive the current round it.
2.
There must be a
complete path of conducting materials through which the current can flow.
A schematic diagram is a representation
of the elements of a system using abstract graphic symbols rather than
realistic pictures.
An electric circuit
diagram is a schematic diagram in the sense that symbols are used to depict
various components of an electric circuit.
Class
activity:
Identifying some
electrical accessories:
Battery |
Capacitors |
Cell |
|
Galvanometer |
lamp/bulb |
Voltmeter |
Transformer |
Switch |
Resistors |
Ammeter |
Types of schematic
(circuit) diagrams
There are two
classes of circuit diagrams, namely:
1.
Series circuit; and
2.
Parallel circuit
Series circuit |
Parallel Circuit |
Class
activity:
In tabular form, state at least two major differences
between series and parallel circuits in your notebook.
Exercises:
1.
What is an electric
circuit?
2.
What is a schematic
diagram?
3.
What is an electric
circuit diagram?
4.
What are two
conditions that must be met before electric current can flow in a circuit?
5.
What are the
symbols of some common electrical accessories?
6.
What are the major
differences between series and parallel circuits?
Research:
1.
List 5 tools used
in electrical wiring.
2.
List 5 accessories
used in the wiring of a house.
3.
List four materials
used in house wiring.
(Credits: www.xpino.net, www.brighthubengineering.com, www.slideshare.net, www.uecng.com, en.wikipedia.org,
play.google.com, shop.pkys.com, www.amazon.com, www.tesla-institute.com, www.electronics-tutorials.ws, www.solarpanelstore.com, www.bbc.co.uk, meetingimprese.forumfree.it)
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