Circuit Analysis
22EECC201
Bridge course
Fundamentals of CA
Team CA
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School Of ECE
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
A quantity of charge that does not change with time is typically represented by
Q. The instantaneous amount of charge (which may or may not be timeinvariant) is commonly represented by q(t), or simply q.
Ex: The total charge flowing out of one end of a small copper wire and into an unknown device is
determined to follow the relationship q(t) = 5e−t/2 C, where t is expressed in seconds. Calculate the current
flowing into the device, taking note of the sign.
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School Of ECE
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Current, Voltage, Power and Energy
Ex: The current flowing into the collector lead of a certain bipolar junction transistor (BJT) is measured to be 1 nA.
If no charge was transferred in or out of the collector lead prior to t = 0, and the current flows for 1 min, calculate
the total charge which crosses into the collector.
Ex: The current flowing through a tungsten-filament light bulb is determined to follow i (t) = 114 sin(100πt) A.
(a) Over the interval defined by t = 0 and t = 2 s, how many times does the current equal zero amperes? (b)
How much charge is transported through the light bulb in the first second?
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School Of ECE
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
P = 120*15 = 1800 Watts
w= pt
30x1000 = 1800xt
t = 16.67 secs
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Current, Voltage, Power and Energy
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Current, Voltage, Power and Energy
Book: Engineering Circuit Analysis by Hayt, Kemmerly and Durbin
Assignments:
Problem no. 15 to 30
Page no. 30 to 33
on charge, current, voltage and power
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Current ,Voltage ,Power and Energy
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Linear, Active and Passive Elements
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Current ,Voltage ,Power and Energy
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Current ,Voltage ,Power and Energy
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Current ,Voltage ,Power and Energy
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Current ,Voltage ,Power and Energy
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Current Division
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Current Division
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Mesh Analysis
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Mesh Analysis
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Mesh Analysis
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Mesh Analysis
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Mesh Analysis
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Mesh Analysis
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