Transcript BASIC_CONCEPTS.ppt

BASIC CONCEPTS
Dr. Mustafa Uyguroglu
Electric Circuit

An electric circuit is an interconnection of electrical
elements.
Systems of UNITS
Quantity
Basic Unit
Symbol
Length
meter
m
Mass
kilogram
kg
Time
second
s
Electric current
ampere
A
Thermodynamic kelvin
Temperature
K
Luminous
intensity
cd
candela
The SI Prefixes
Charge and Current
Electric Current
Electric Current

The charge transferred between time t0 and t
t
q   idt
to
Voltage
Power
Energy
Passive Sign Convention
PSC: Example I
PSC: Example II
PSC: Example III
Circuit Elements

Ideal Independent Source: provides a specified

voltage or current that is completely independent of other
circuit variables
Ideal Independent Voltage Source:
Circuit Elements

Ideal independent current source
Circuit Elements

Ideal dependent voltage source

Ideal dependent current source