Lesson-1 Flashcards
What’s the measure unit of q?
Coulomb
Which are the circuit variables?
1.charge 2.current 3.power 4.voltage 5.energy
How much is e?
(-)1.6*10^(-19)
What’s reference direction?
Direction of q+ charge
When does deltaq have meaning?
After I put reference direction
What does deltaq depend from?
Deltaq dependens from the time in which deltaq net charge is transferred
What’s i(t)?
i(t) is a lim(deltat->0) (deltaq/deltat)
di(t)=dq/dt
What’s the measure unit of current i(t)?
C/S=A Ampere
Which is the verse of e?
The opposite of the current i(t) verse
What’s the total amount of charge transferred between [0,t]?
q(t)=integral[0,t] of i(t) dt
What’s derivation of q(t)?
It’s i(t)
What are the submultiplies of ampere?
mA 10^(-3)
µA 10^(-6)
nA 10^(-9)
pA 10^(-12)
What’s DC current?
it’s a direct current given by the non-variation of i(t) during the time
What’s AC current?
it’s a alternate current given by the variation of i(t) during the time
Harmonic Motion
i(t)=Ip*cos(wt+ß)
w=2π/T
What’s Ea,b?
Ea,b is the Potential Energy
What’s v?
v is the voltage
v=lim(deltaq->0) (deltaE/deltaq)
dv=dE/dq
va,b=(Ea-Eb)/deltaq
What’s local reference?
Local Reference is the point che we assume like principal Referiment (the point zero for example)
What’s the value of v in this case?
v=-v1
What’s v*i?
v*i=dE/dq * dq/dt =dE/dt=P
What’s the measure unit of Power?
Watt
What’s a ideal wire?
A wire without loss of deltaq
What’s a Normal Sign Reference?
It is a situation where the v has opposite verse that i
That is verify with Lamps, P absorbed by Device
What’s a Non-Normal Sign Reference?
It is a situation where v has same verse that i
That is verify with generetors, P supplied by Device
