Image result for Electrical circuits An electric circuit is a path in which electrons from a voltage or current source flow. The point where those electrons enter an electrical circuit is called the "source" of electrons.

1. Computer Science and Engineering
CSE-132: Electrical Circuits:
Introduction
• Electrical circuits
– are part of the basic fabric of modern technology.
Objectives
- to equip the students with in-depth basic concepts and understanding of
how to analysis and design electric circuits that is building blocks of
modern technology.
Importance
- analysis and design of electric circuits are critical skills for all engineers
- that is essential for an engineer to design complex electronic,
communication, computer, and control systems as well as consumer
products.
•

2. Computer Science and Engineering
CSE-132: Electrical Circuits:
Electricity
• Natural phenomenon controlled for different purposes of human
being. Modern technological amenities in the fields of
communication, computer, industrial and domestic appliances have
been developed through this phenomenon.
• physical phenomenon arising from the existence and interaction of
electric charge.
Characteristics
• The outstanding characteristics are its mobility and flexibility.
– can be moved to any point along couple of wires and, depending on
the user’s requirements
– Can be converted to light, heat and motion.

3. Computer Science and Engineering
CSE-132: Electrical Circuits:
Electric circuits and current flow
• An electric circuit or electric network is an interconnection
of electrical elements linked together in a closed path so
that an electric current may flow continuously.
• 1 A current is defined as the constant current in two
parallel conductors of infinite length and negligible cross
section, one meter apart in vacuum, which produces a
force between the conductors of 2 X 10-7
N/m length.

4. current results from charges in motion.
Computer Science and Engineering
CSE-132: Electrical Circuits:

5. current results from charges in motion.
Computer Science and Engineering
CSE-132: Electrical Circuits:
• Unit of current is Ampere (A). 1A = 1 C/s.
Hence 1 A is equivalent to 1 C of charge
moving across a fixed surface in 1 s.
• DC (direct current): If the current flowing
through an element is constant and of
unidirectional
• AC (alternating current): A time varying
current i(t) : Such as a ramp, a sinusoidal or
an exponential

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